Ashley chemistry

Except for hydrogen, the elements that are gases at room temperature are ____________. a. actinides b. metals c. metalloids d. nonmetals

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name each 7, N, Nitrogen, 14.007, (He) 2s2^2p^3

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write the electron dot structure and what is the group number the element for Bi?

5 dots around it

In general, a metal atom's valence electrons are _____________ the atomic nucleus. a. loosely bound to b. very near c. within d. tightly bound to

A metal atom's valence electrons are loosely bound to its positive nucleus

16. A transistor may be produced by placing a p-typesemiconductor between two _______________. a. n-type semiconductors b. p-type semiconductors c. electrons d. molecules

A transistor may be produced by placing a p-type semiconductor between two n-type semiconductors

Select the symbol of the element that fits the following descriptions. the group13 metal in the third period

Al

In a conductor such as silver, valence electrons are free to move to produce _____________. a. an electric current b. electrical potential c. copper atoms d. nuclei

An electric current is made up of moving electrons

Which of the following elements is a metalloid? a. As b. Na c. W d. F

Arsenic (As) is a metalloid

Select the symbol of the element that fits the following descriptions. The group 15 metalloid in the fourth period

As

match element in column A to the element in column B that has the most similar chemical properties Column A--gallium /Column B.--a.boron (B), b. cesium (Cs), c.chromium (Cr), d.- Cobalt ( Co), e.hafnium(Hf), f.- iodine (I ), g-iron (Fe), h.- Nitrogen (N), i.- platinum( Pt), j.- scandium (Sc) k.- Silicon (Si), l.-strontium (Sr) m.- Sulfur (S), m.- zinc ( Z), o.- xenon (Xe)

Boron (B)

Select the symbol of the element that fits the following descriptions. the halogen that exists as a liquid at room temperature

Br

This element is a halogen. a. bromine b. carbon c. nitrogen d. oxygen

Bromine

write the electron dot structure and what is the group number the element C?

C 4 dots around it

Which element is NOT suitable to dope silicon to produce an n-type semiconductor? a. carbon b. phosphorus c. arsenic d. antimony

Carbon is not suitable to dope silicon to produce an n-type semiconductor

match element in column A to the element in column B that has the most similar chemical properties Column A-sodium (Na) / Column B.-a.boron (B), b. cesium (Cs), c.chromium (Cr), d.- Cobalt ( Co), e.hafnium(Hf), f.- iodine (I ), g-iron (Fe), h.- Nitrogen (N), i.- platinum( Pt), j.- scandium (Sc) k.- Silicon (Si), l.-strontium (Sr) m.- Sulfur (S), m.- zinc ( Z), o.- xenon (Xe)

Cesium (Cs)

Halogens are good disinfectants. Which of the following is a halogen? a. N b. O c. Cl d. Fe

Chlorine (Cl) is a halogen

match element in column A to the element in column B that has the most similar chemical properties Column A-tungsten (W) / Column B.-a.boron (B), b. cesium (Cs), c.chromium (Cr), d.- Cobalt ( Co), e.hafnium(Hf), f.- iodine (I ), g-iron (Fe), h.- Nitrogen (N), i.- platinum( Pt), j.- scandium (Sc) k.- Silicon (Si), l.-strontium (Sr) m.- Sulfur (S), m.- zinc ( Z), o.- xenon (Xe)

Chromium (Cr)

write the electron dot structure and what is the group number the element for Cl?

Cl 7 dots around element

match element in column A to the element in column B that has the most similar chemical properties Column A-iridium (Ir) /Column B.-a.boron (B), b. cesium (Cs), c.chromium (Cr), d.- Cobalt ( Co), e.hafnium(Hf), f.- iodine (I ), g-iron (Fe), h.- Nitrogen (N), i.- platinum( Pt), j.- scandium (Sc) k.- Silicon (Si), l.-strontium (Sr) m.- Sulfur (S), m.- zinc ( Z), o.- xenon (Xe)

Cobalt (Co)

write the electron dot structure and what is the group number the element for Cs?

Cs 1 dot around it

In boron-doped silicon, electrons are said to move into and out of ___________. a. diodes b. holes c. inner energy levels d. nuclei

Electrons move into and out of holes in boron-doped silicon

describe element number 18 in terms of its period and group number, family number, and closest neighboring elements

Element 18 is in period 3 and group 18. It is a noble gas and its nearest neighbors are Ne, F, Cl, Br and Kr

name if false or true. correct word in the parenthese if false. Group8A elents are very unreactive elements known as (transition metals)

False noble gases

From beryllium to radium, you would expect the chemical reactivities of the elements in Group 2 to ____________. a. decrease b. increase c. increase, then decrease d. remain the same

From beryllium to radium, you would expect the chemical reactivities of the metallic elements in Group 2 to increase

What group of elements was unknown to Mendeleev when he first organized his periodic table?

Group 18, the noble gases

match element in column A to the element in column B that has the most similar chemical properties Column A- zirconium (Zr)/Column B.-a.boron (B), b. cesium (Cs), c.chromium (Cr), d.- Cobalt ( Co), e.hafnium(Hf), f.- iodine (I ), g-iron (Fe), h.- Nitrogen (N), i.- platinum( Pt), j.- scandium (Sc) k.- Silicon (Si), l.-strontium (Sr) m.- Sulfur (S), m.- zinc ( Z), o.- xenon (Xe)

Hafnium (Hf)

Select the symbol of the element that fits the following descriptions.the lightest of the noble gases

He

Heavy elements such as seaborgium are created in _____________. a. erlenmeyer flasks b. earthquakes c. particle accelerators d. test tubes

Heavy elements such as seaborgium are created in particle acclerators such as linear accelerators

Select the symbol of the element that fits the following descriptions. the only metal that is a liquid at room temperature

Hg

How is the energy level of an element's valence electrons related to its period on the periodic table? Give an example

Hydrogen has 1 valence electron and its group # is 1 . The number of valence electrons is equal to the group number.

as the atomic mass of a halogen increases, the point at which it turns from liquid to gas

Increases

the modern periodic law says that the properties of the elements repeat periodically when the elements are arranged according to a certain trend.What is that trend?

Increasing atomic number

match element in column A to the element in column B that has the most similar chemical properties Column A-bromine /Column B.-a.boron (B), b. cesium (Cs), c.chromium (Cr), d.- Cobalt ( Co), e.hafnium(Hf), f.- iodine (I ), g-iron (Fe), h.- Nitrogen (N), i.- platinum( Pt), j.- scandium (Sc) k.- Silicon (Si), l.-strontium (Sr) m.- Sulfur (S), m.- zinc ( Z), o.- xenon (Xe)

Iodine (I)

The Lewis electron dot structure for this element contains seven dots. a. francium b. iodine c. manganese d. zinc

Iodine has seven outermost electrons and seven dots in its Lewis electron dot structure

match element in column A to the element in column B that has the most similar chemical properties Column A-osmium (Os) / Column B.-a.boron (B), b. cesium (Cs), c.chromium (Cr), d.- Cobalt ( Co), e.hafnium(Hf), f.- iodine (I ), g-iron (Fe), h.- Nitrogen (N), i.- platinum( Pt), j.- scandium (Sc) k.- Silicon (Si), l.-strontium (Sr) m.- Sulfur (S), m.- zinc ( Z), o.- xenon (Xe)

Iron (Fe)

write the electron dot structure and what is the group number the element for Kr?

Kr 8 dots around it

In what part of the periodic table would you expect to find an element that emits light when struck by electrons? a. actinide series b. lanthanide series c. group 2A elements d. group 3A elements

Lanthanide series.Lanthanides are part of the inner transition metals

Lanthanides and actinides are known as _________________. a. inner transition elements b. noble gases c. metalloids d. halogens

Lanthanides and actinides are known as inner transition elements

The chemical symbol for sodium is derived from the __________ word natrium.

Latin

why was mendeleev's periodic table a powerful tool for the science of chemistry in the nineteenth century

Mendeleev's table allowed him to predict the properties of undiscovered elements

classify the element Mg as a metal, nonmetal, or metalloid

Metal

These elements have some physical and chemical properties of metals and other properties of nonmetals. a. actinides b. lanthanides c. metalloids d. transition elements .

Metalloids have some physical and chemical properties of metals and other properties of nonmetals

write the electron dot structure and what is the group number the element Mg?

Mg 2 dots around it

As a result of ?who?are the elements in the modern periodic table are arranged according to increasing atomic number.

Moseley

Noble gases are unreactive because they have a full complement of ________________. a. inner-level electrons b. neutrons c. protons d. valence electrons

Noble gases have full complements of valence electrons

classify the element Br as a metal, nonmetal, or metalloid

Nonmetal

classify the element C as a metal, nonmetal, or metalloid

Nonmetal

classify the element Cl as a metal, nonmetal, or metalloid

Nonmetal

classify the element Kr as a metal, nonmetal, or metalloid

Nonmetal

classify the element O as a metal, nonmetal, or metalloid

Nonmetal

classify the element P as a metal, nonmetal, or metalloid

Nonmetal

Which of the following are poor conductors of heat and electricity? a. metals b. metalloids c. nonmetals d. alkaline earth elements

Nonmetals are poor conductors of heat and electricity

write the electron dot structure and what is the group number the element for O?

O 6 dots around it

3. These elements have six electrons in their outermost energy levels. a. O, S, and Se b. Cr, Mo, and W c. Cr, Mn, and Fe d. He, Ne, and Ar

O, S, and Se have six electrons in their outermost energy level

write the electron dot structure and what is the group number the element P?

P 5 dots around it

match element in column A to the element in column B that has the most similar chemical properties Column A-nickel (Ni) / Column B.-a.boron (B), b. cesium (Cs), c.chromium (Cr), d.- Cobalt ( Co), e.hafnium(Hf), f.- iodine (I ), g-iron (Fe), h.- Nitrogen (N), i.- platinum( Pt), j.- scandium (Sc) k.- Silicon (Si), l.-strontium (Sr) m.- Sulfur (S), m.- zinc ( Z), o.- xenon (Xe)

Platinum (Pt)

Plutonium and americium are ______________. a. metalloids b. Noble gases c. nonmetals d. synthetic elements

Plutonium and americium are synthetic elements

An incomplete set of atomic mass, density, and melting point is given for three elements in a triad. Following the patterns of Dobereiner's triads, predict a likely number for each missing value. Element K 39.1-atomic mass-______density-336 melting point, Rb ______-atomic mass-1.53 density-313 Melting point, Cs 133-atomic number-1.87 density-_______melting point

Rb-atomic mass, 86.1u K- density,1.19 g/ml Cs-melting point, 290K

match element in column A to the element in column B that has the most similar chemical properties Column A- yttrium (Y) /Column B.-a.boron (B), b. cesium (Cs), c.chromium (Cr), d.- Cobalt ( Co), e.hafnium(Hf), f.- iodine (I ), g-iron (Fe), h.- Nitrogen (N), i.- platinum( Pt), j.- scandium (Sc) k.- Silicon (Si), l.-strontium (Sr) m.- Sulfur (S), m.- zinc ( Z), o.- xenon (Xe)

Scandium (Sc)

match element in column A to the element in column B that has the most similar chemical properties Column A-germanium(Ge) /Column B.-a.boron (B), b. cesium (Cs), c.chromium (Cr), d.- Cobalt ( Co), e.hafnium(Hf), f.- iodine (I ), g-iron (Fe), h.- Nitrogen (N), i.- platinum( Pt), j.- scandium (Sc) k.- Silicon (Si), l.-strontium (Sr) m.- Sulfur (S), m.- zinc ( Z), o.- xenon (Xe)

Silicon (Si)

Sodium and chlorine react to produce ______________. a. gaseous chlorine b. liquid sodium c. sodium chloride d. sodium chlorine

Sodium and chlorine react to produce sodium chloride

match element in column A to the element in column B that has the most similar chemical properties Column A-magnesium (Mg) / Column B.-a.boron (B), b. cesium (Cs), c.chromium (Cr), d.- Cobalt ( Co), e.hafnium(Hf), f.- iodine (I ), g-iron (Fe), h.- Nitrogen (N), i.- platinum( Pt), j.- scandium (Sc) k.- Silicon (Si), l.-strontium (Sr) m.- Sulfur (S), m.- zinc ( Z), o.- xenon (Xe)

Strontium (Sr)

match element in column A to the element in column B that has the most similar chemical properties Column A-tellurium (Te) / Column B.-a.boron (B), b. cesium (Cs), c.chromium (Cr), d.- Cobalt ( Co), e.hafnium(Hf), f.- iodine (I ), g-iron (Fe), h.- Nitrogen (N), i.- platinum( Pt), j.- scandium (Sc) k.- Silicon (Si), l.-strontium (Sr) m.- Sulfur (S), m.- zinc ( Z), o.- xenon (Xe)

Sulfur (S)

What is the Group number of the alkali metals? a. 1 b. 2 c. 3 d. 4

The alkali metals are in Group 1 of the periodic table

Which group on the periodic table is known as the alkaline earth metals? a. group 1A b. group 2A c. group 8A d. group 7A

The alkaline earth metals are in group 2A

Which group on the periodic table is known as the halogens? a. group 1A b. group 2A c. group 8A d. group 7A

The halogens are in group 7A.

Why was Mendeleev's periodic table widely accepted? a. He organized the first 14 known elements. b. He predicted the existence and properties of undiscovered elements. c. He was the first to notice a pattern of similar properties among elements. d. His periodic table listed all of the elements in the correct order.

There is a periodic repetition of chemical and physical properties of elements when they are arranged by increasing atomic number

20. What characteristic do atoms in the same group of elements share? a. They have the same atomic mass. b. The have the same number oelectron orbitals. c. They have the same number of valence electrons. Elements in the same group have similar properties because they have the same number of electrons in their outermost shell. d. They have similar physical properties

They have the same number of valence electrons

why do sodium and potassium, which belong to the same group in the periodic table, have similar chemical properties?

They have the same number of valence electrons.

match element in column A to the element in column B that has the most similar chemical properties Column A-neon (Neon) / Column B.-a.boron (B), b. cesium (Cs), c.chromium (Cr), d.- Cobalt ( Co), e.hafnium(Hf), f.- iodine (I ), g-iron (Fe), h.- Nitrogen (N), i.- platinum( Pt), j.- scandium (Sc) k.- Silicon (Si), l.-strontium (Sr) m.- Sulfur (S), m.- zinc ( Z), o.- xenon (Xe)

Xenon (Xe)

match element in column A to the element in column B that has the most similar chemical properties Column A-cadmium /Column B.-a.boron (B), b. cesium (Cs), c.chromium (Cr), d.- Cobalt ( Co), e.hafnium(Hf), f.- iodine (I ), g-iron (Fe), h.- Nitrogen (N), i.- platinum( Pt), j.- scandium (Sc) k.- Silicon (Si), l.-strontium (Sr) m.- Sulfur (S), m.- zinc ( Z), o.- xenon (Xe)

Zinc (Z)

The octave law did not work for all the known elements and was not generally what?

accepted

Sterling silver is _____________.

an alloy

The number of protons in the nucleus of the atoms of an element determines the element's _____________.

atomic number

the element in the modern periodic table are arranged according to increasing what?

atomic number

The first period table is accredited to who?

dmitri mendeleev

According to the octave law, the properties repeat every____ element.

eight

One important result of Mendeleev 's periodic table was the existence and properties of undiscovered ?what? can be predicted.

elements

name if false or true. correct word in the parenthese if false. (Group) 3A elements are the alkaline earth metals

false 2A

name if false or true. correct word in the parenthese if false. There are (two) main classifications of elements.

false 3

name if false or true. correct word in the parenthese if false. More than three-fourth of the elements in the periodic table are (nonmetals)

false metals

name if false or true. correct word in the parenthese if false. Metalloids have properties of both metals and (inner transition metals)

false non metals

In which state does chlorine exists at room temperature

gas

A column on the periodic table

group

In mendeleev's table the elements are arranged according to increasing what?

mass

Elements that are shiny and conduct electricity

metals

n- and p-type semiconductors may be combined to form _____________. a. diodes b. transistors c. cathode-ray tubes d. vacuum tubes

n- and p-type semiconductors may be combined to form diodes

1=H, 2=Li, 3=H, 4=Bo, 5=C, 6=N , 7=O 8=F, 9=Na, 10=Mg, 11=Al, 12=Si,13=P,14=S According to the octave law, element 2 has similar properties as what element

nine

match element in column A to the element in column B that has the most similar chemical properties Column A-arsenic /Column B.-a.boron (B), b. cesium (Cs), c.chromium (Cr), d.- Cobalt ( Co), e.hafnium(Hf), f.- iodine (I ), g-iron (Fe), h.- Nitrogen (N), i.- platinum( Pt), j.- scandium (Sc) k.- Silicon (Si), l.-strontium (Sr) m.- Sulfur (S), m.- zinc ( Z), o.- xenon (Xe)

nitrogen (N)

The table was developed by John Newsland and is based on relationship called?

octaves

A row on the periodic table

period

4. The statement that the physical and chemical properties of the elements repeat in a regular pattern when they are arranged in order of increasing atomic number is known as the ______________.

periodic law

the modern form of the periodic table results in the ?what?

periodic law

the periodic table is arranged according to increasing atomic number, there is a periodic repetition of their chemical and physical what?

properties

the modern periodic table, arrangement is based on number of ?what? in the nucleus of an atom of the element

protons

Group A elements

representative elements

Group B elements

transitional elements

name if false or true. correct word in the parenthese if false. Group1A elements except for hydrogen are known as (alkali metals)

true

name if false or true. correct word in the parenthese if false. Group7A elements are highly reactive nonmetals known as (halogens)

true