Unit 7

Two forms of solid carbon, diamond and graphite, differ in their physical properties due to the differences in their 1.atomic numbers 2.crystal structures 3.isotopic abundances 4.percent compositions

2

What is represented by the dots in a Lewis electron-dot diagram of an atom of an element in period 2 of the periodic table? 1)the total number of electrons in the atom 2)the number of valence electrons in the atom 3)the number of protons in the atom 4))the number of neutrons in the atom

2

What is the number of electrons in a CL3+ ion? 1)18 2)21 3)24 4)27

2

When an atom loses an electron, it becomes an ion that is 1)positively charged and gains a small amount of mass 2)positively charged and loses a small amount of mass 3)negatively charged and gains a small amount of mass 4)negatively charged and loses a small amount of mass

2

Which elements have the most similar chemical properties? 1.boron and carbon 2.oxygen and sulfur 3.aluminum and bromine 4.argon and silicon

2

Which list represents the classification of the elements nitrogen,neon,magnesium,and silicon,respectively? 1.metal,metalloid,nonmetal,noble gas 2.nonmetal,noble gas,metal,metalloid 3.nonmetal,metalloid,,noble gas,metal 4.noble gas,metal,metalloid,nonmetal

2

Which property can be described as the ability of a substance to be hammered into thin sheets? 1)conductivity 2)malleability 3)melting point 4)solubility

2

Which trend is observed as the first four elements in group 17 on the PR are considered in order of increasing atomic number? 1.electronegativity increases 2.first ionization decreases 3.the number of valence electrons increases 4.the number of electron shells decreases

2

Which trend is observed as the first four elements in group 17 on the PT are considered in order of increasing atomic number? 1)electronegativity increases 2)first ionization decreases 3)The number of valence electrons increases 4.the number of electron shells decreases

2

which particle has the same electron configuration as a potassium ion? 1)neon 2)argon atom 3)fluoride ion 4)sodium atom

2

An atom of which element has the highest attraction for the electrons in a bond? 1)aluminum 2)Carbon 3)Chlorine 4)lithium

3

As an Na atom forms an Na2+ ion, the number of protons in its nucleus 1.decreases 2.increases 3.remains the same

3

At STP,which element is malleable and a good conductor of electricity? 1)xenon 2)silicon 3)platinum 4)hydrogen

3

What id the total number of electrons in a Cu+ ion? 1)30 2)36 3)28 4)29

3

What element is a metalloid? 1.Cr 2.Cs 3.Sc 4.Si

4

Which electron configuration is correct for a sodium ion? 1)2-8-1 2)2-8-2 3)2-7 4)2-8

4

Which element attains the structure of a noble gas when it becomes a 1+ion? 1)Ne 2)F 3)Ca 4)K

4

Which ion has the largest radius? 1)Br- 2)Bl- 3)F- 4)I-

4

which element is least likely to undergo a chemical reaction? 1.lithium 2.carbon 3.fluorine 4.neon

4

which property decreases when the elements in group 17 are considered of increasing atomic number? 1.atomic mass 2.atomic radius 3.melting point 4.electronegativity

4

Atoms of which element have the weakest attraction for electrons? A)Na B)P C)Si D)S

a

Compared to a potassium atom, a potassium ion has A)a smaller radius B)a larger radius C)fewer protons D)more protons

a

Which element is a noble gas? A)krypton B)chlorine C)Antimony D)Manganese

a

Which element is a noble gas? A)krypton B)chlorine C)antimony D)manganese

a

Which list of elements contains only a metal,a metalloid,and a nonmetal? A)Ag,Si,I2 B)Ge,As,Ne C)K,Cu,Br2 D)S,CL2,Ar

a

an element that has a low first ionization energy and good conductivity of heat and electricity is classified as a A)metal B)metalloid C)nonmetal D)noble gas

a

what is the net charge of an ion that consists of 10 electrons,11,protons and 12 neutrons A)1+ B)2+ C )1- D)2-

a

which element is considered malleable? A)gold B)hydrogen C)sulfur D)radon

a

An atom of which element has the largest radius? a.Fe b.Mg c.Si d.Zn

b

An element has an ionization energy of 314kJ/mol and an electronegativity of 3.5.It is classified as a A)metal B)non-metal C)metalloid D)halogen

b

In the ground state,an atom of each of the elements in Group 2 has a different A)oxidation state B)first ionization energy C)number of valence electrons D)number of electrons in the first shell

b

The arrangement of the elements from left to right in period 4 on the periodic table is based on A)atomic mass B)atomic number C)the number of electron shells D)the number of oxidation states

b

The distance across an atom of an element in the solid phase is 256 pm.The atomic radius of an atom of this element is closest to A)64pm B)128pm C)256pm D)512pm

b

The two forms of oxygen,O2(g) and O3(g),have A)different molecular structures and identical properties B)different molecular structures and different properties C)identical molecular structures and identical properties D)identical molecular structures and different properties

b

Which Group 15 element exists as a diatomic molecule at ST? A)phosphorus B)Nitrogen C)Bismuth D)Arsenic

b

Which Group 15 element exists as a diatomic molecule at STP? A)phosphorus B)Nitrogen C)bismuth D)arsenic

b

Which element is a noble gas? A)Antimony B)Krypton C)Gold D)francium

b

Which physical characteristics of a solution may indicate the presence of a transition element? A)its density B)its color C)its effect on limus D)the effect on phenolphthalein

b

Which property can be defined as the ability of a substance to be hammered into thin sheets? A)conductivity B)malleability C)melting point D)solubility

b

Which statement explains why ozone gas,O3,and ozygen gas,O2,have different properties? A)They are formed from different elements B)They have different molecular structures C)They have different oxidation numbers D)They have different electronegativities

b

which element occurs as a solid at STP? A)Bromine B)Carbon C)Mercury D)Nitrogen

b

At STP,which element is a good conductor of electricity? A)chlorine B)iodine C)silver D)sulfur

c

Based on Table S,an atom of which element has the strongest attraction for electrons in a chemical bond? A)Chlorine B)Nitrogen C)Oxygen D)Selenium

c

Based on Table S,which group on the PT has the element with the highest electronegativity? A)Group 1 B)Group 2 C)Group 17 D)Group 18

c

In which group of elements do the atoms gain electrons most readily? A)1 B)2 C)16 D)18

c

The elements on the Periodic table of the elements are arranged in order of increasing A)atomic mass B)formula mass C)atomic number D)oxidation number

c

Which characteristics both generally decrease when the elements in Period 3 on the periodic table are considered in order from left to right? A)nonmetallic properties and atomic radius B)nonmetallic properties and ionization energy C)metallic properties and atomic radius D)metallic properties and ionization energy

c

Which compound forms a green aqueous solution? A)RbCL B)CaCL2 C)NiCL2 D)MgCL2

c

Which compound forms a green aqueous solution? A)RbCL B)CaCL2 C)NiCL2 D)ZnCL2

c

Which element is liquid at room temperature? A)K B)I2 C)Hg D)Mg

c

Which list includes elements with the most similar chemical properties? A)Br,Ga,Hg B)Cr,Pb,Xe C)O,S,Se D)N,O,F

c

Which statement describes the general trends in electronegativity and first ionization energy as the elements in Period 3 are considered in order from Na to Cl? A) Electronegativity increases, and first ionization energy decreases. B) Electronegativity decreases, and first ionization energy increases. C) Electronegativity and first ionization energy both increase. D) Electronegativity and first ionization energy both decrease.

c

A sample of an element is malleable and can conduct electricity.This element could be A)H B)He C)S D)Sn

d

An atom in the ground state has a stable valence elctron configuration. This atom could be an atom of a. Al b. Cl c. Na d. Ne

d

Atoms of metallic elements tend to A)gain electrons and form negative ions B)gain electrons and form positive ions C)lose electrons and form negative ions D)lose electrons and form positive ions

d

Which element at STP exists as monatomic molecules? A)N B)O C)CL D)Ne

d

Which element has an atom in the ground state with the most loosely bound electron? A)He B)As C)Xe D)Cs

d

Which element is a liquid at STP and has a low electrical conductivity? A)silver B)mercury C)barium D)bromine

d

Which element is malleable and ductile? A)S B)Si C)Ge D)Au

d

Which group in the Periodic table contains elements that are all monotomic gases at STP? A)15 B)16 C)17 D)18

d

Which of the following electron configurations represents the element with the smallest atomic radius? A)2-4 B)2-5 C)2-6 D)2-7

d

Which trends are observed as each of the elements within group 15 on the periodic table is considered in order from top to bottom? A)Their metallic properties decrease and their atomic radii decrease B)Their metallic properties decrease and their atomic radii increase C)Their metallic properties increase and their atomic radii decrease D)Their metallic properties increase and their atomic radii increase

d

which phrase describes the two forms of solid carbon,diamond and graphite,at STP? A)the same crystal structure and the same properties B)the same crystal structure and the different properties C)different crystal structures and the same properties D)different crystal structures and different properties

d

Comparedto a Be2+ion,a Be0 atom has 1)fewer protons 2)more electrons 3)fewer protons 4)more protons

2

A solid element that is malleable,a good conductor of electricity,and reacts with oxygen is classified as a 1.metal 2.metalloid 3.noble gas 4.nonmetal

1

As the first 5 elements in group 15 are considered in order of increasing atomic number,first ionization energy 1.decreases 2.increases 3.decreases,then increases 4.increases,then decreases

1

In the ground state ,all atoms of group 15 elements have the same number of 1.valence electrons 2.electron shells 3.neutrons 4.protons

1

Rubidium and Cesium have similar chemical properties in the ground state,the atoms of both elements each have 1.one electron in the outermost shell 2.two electrons in the outermost shell 3.one neutron in the nucleus 4.two neutrons in the nucleus

1

Which element tends not to react with other elements? 1.helium 2.hydrogen 3.phosphorus 4.potassium

1

which general trends in the first ionization energy and electronegativity values are demonstrated by group 15 elements as they are considered from top to bottom? 1.the first ionization energy decreases and the electronegativity decreases 2.the first ionization energy increases and the electronegativity increases 3.the first ionization energy decreases and the the electronegativity increases 4.The first ionization energy increases and the electronegativity decreases

1

Compared to the radius of a chlorine atom,the radius of a chloride ion is 1.larger because chlorine loses an electron 2.larger because chlorine gains an electron 3.smaller because chlorine loses an electron 4.smaller because chlorine gains an electron

2