Chemisty

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A molecule is a

a neutral group of atoms held together by covalent bonds

A molecule is a:

a neutral group of atoms held together by covalent bonds

A chemical bond resulting from the electrostatic attraction between positive and negative ions is called a(n)

ionic bond

A chemical bond resulting from the electrostatic attraction between positive and negative ions is called a(n):

ionic bond

The electrostatic attraction between ____ forms an ionic bond.

ions

A 5 gram object that sinks in salt water will have a volume:

less than 5 mL

When chemical compounds form, valence electrons are those that may be:

lost, gained or shared

An example of an extensive property of matter is:

mass, volume, temperature

An example of an intensive property of matter is

melting point, density

A group of many atoms held together by covalent bonds and has a charge is known as a

molecular formula

An ionic compound is usually formed between a metal and a:

nonmetal

Elements to the upper right side of the "staircase/zig-zag" have properties most associated with

nonmetals

Ions

positively and negatively charged atoms

The wave with the lowest frequency on the EM spectrum is:

radio

Because a few positively charged particles bounced back from the foil, Rutherford concluded that such particles were:

repelled by densely packed regions of positive charge.

A family or a group of elements is expected to have:

similar chemical and physical properties

A chemical bond results from the transfer or sharing of:

valence electrons

periodic table groups

vertical columns

The independent variable would be:

volume

As the atomic number of the metals of Group 1 increases, the ionic radius

increases

In the modern periodic table, elements are ordered according by

increasing atomic number

A scientist finds an atom of chlorine that has gained an extra electron. What is the charge of that atom?

-1

Convert 55 mm to Km. What would be the answer's exponent if written in scientific notation?

-5

Convert 12 nanometers (nm) to decimeters (dm). What is the answer's exponent?

-7

23 grams of sodium is reacted with chlorine to produce sodium chloride (table salt). If 58 grams of sodium chloride was produced, how many grams of chlorine must have reacted?

35 g

In the NaCl crystal, each Na + and Cl - ion has clustered around it ____ of the oppositely charged ions.

4

Alpha

4/2 He

In scientific notation, 0.00005 would be:

5 x 10^-5

What is the ionic charge of elements in the alkali family?.

+1

A scientist finds an atom of carbon that has lost 4 electrons. What is carbon's charge?

+4

Beta

0/-1 e

According to the graph, the density of water would be:

1 g/mL

A graduated cylinder is initially filled with water to the 15 mL mark. An irregularly shaped object is placed in the graduated cylinder. The water rises to the 27 mL mark. The volume of the object is:

12 mL

An isotope of Sodium has a mass of 24. How many neutrons are in this isotope?

13

The mass of an object with a volume of 10 mL and a density of 2g/mL would be:

20g

Divide 1.05 x 10-6 by 2.77 x 10-5

3.79 x 10^-2

Convert 30,000 Kilometers (Km) to Megameters (Mm)

30

The number of valence electrons in Group 17 or 7A Halogen elements is

7

The number of valence electrons in Group 7A or 17 Halogen elements is:

7

What family has the lowest electronegativity and lowest ionization energy?

Alkali Metals

periodic table families

Alkali metals, Alkali Earth metals, Boron family, Carbon family, Nitrogen family, Oxygen family, Halogen family, and Nobel gases family. The bottom row has the Lanthanide series and the Actinide series.

Isotopes

Atoms of the same element that have different numbers of neutrons

Halogens

Contains nonmetals, 7 valence electrons in it's outermost energy level. Very reactive

valence electrons

Electrons on the outermost energy level of an atom

True/False: An object with a mass of 100 grams and a volume with 22 mL would FLOAT in water

False

What element has an ending electron configuration of 3d6?

Fe

What describes the splitting of an atom's nucleus to release energy?

Fission

What process occurs in the sun in which hydrogen atoms combine to form sunlight?

Fusion

alkali metals

Group 1, 1 electron in outer level, very reactive, soft, silver, shiny, low density; Lithium, Sodium, Potassium, Rubidium, Cesium, Francium

The elements that border the zigzag line in the periodic table are

Metalloids

Na-24 produces what isotope after undergoing beta decay?

Mg-24

What is the formula for Magnesium Chloride?

MgCl2

What would be the formula for Magnesium Chloride?

MgCl2

What would be the name for NaNO3?

Sodium Nitrate

What family has the highest overall ionization energy but virtually zero electronegativity?

Noble Gases

Polonium 215 would produce what isotope after undergoing alpha decay? (you should work this out on paper, instead of staring blankly at the screen!)

Pb- 211

What form of Uranium is fissile and is capable of undergoing a chain reaction?

U-235

Gallium would have a noble gas electron configuration of

[Ar]-4s2-3d10-4p1

Gallium would have a noble gas electron configuration of:

[Ar]4s 2 3d 10 4p 1

Which of the following are Intensive Properties of Matter?

boiling point, density, color

The nucleus of an atom has all of the following characteristics EXCEPT that it:

contains nearly all of the atom's volume.

As you move left to right from gallium through bromine, the atomic radii will:

decrease

A graph which plots mass (y) vs. volume (x) would have a slope that represents:

density

A chemical bond results from the mutual attraction of the nuclei of atoms and

electrons

The light from a hot/excited gas would be expected to produce which of the following spectra?

emission spectrum

For an electron in an atom to change from the ground state to an excited state, what must happen?

energy must be absorbed.

metals and nonmetals

form ionic bonds

As you move left to right from gallium through bromine, atomic radii

generally decreases

The three primary colors of light are red, blue and:

green

gamma rays

high-energy electromagnetic waves emitted from a nucleus as it changes from an excited state to a ground energy state

independent variable

x-axis

dependent variable

y-axis


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