Elements
Atoms
Density
Moles
Miscellaneous
10

This element has the atomic symbol Rb.

Rubidium.

10

The charge of an electron is _______.

-1 or negative

10

A cloud weights 3.60 g and has a volume of 1.45x10^(5)mL. It has a density of ________.

2.48x10^(-5) g/mL.

10

There are __________ particles in one mole of substance. (Avogadro's #)

6.022x10^(23).

10

A substance that has a definite volume but not definite shape is in the _______ phase.

liquid.

20

These two elements make up the compound known as table salt.

Sodium (Na) and Chlorine (Cl).

20

The structure of a neutral Boron-10 atom.

5 protons and 5 neutrons in the nucleus with 5 electrons

20

500 grams of sugar occupies a volume of 0.315 liters. What is the density of the sugar in grams per milliliter?

1.587 g/mL

20

There are ______ moles in 2.13 g of carbon.

0.177 moles.

20

Chicken noodle soup is an example of a _________ mixture. (Homogeneous or heterogeneous).

Heterogeneous.

30

This element is located in Group 4A and Period 3.

Silicon (Si).

30

In the Kinetic Molecular Theory, all matter consists of small particles in ________, ________ motion. (2 answers)

constant random.

30

A soda has a a density of 4.71 g/cubic centimeter and a mass of 1.84x10^(8)micrograms. The soda has a volume of ________(mL).

39.1 mL.

30

There is a chunk of graphite(C) that weighs 5.67x10^(10) nanograms. There are _______ moles of Carbon in that chunk of graphite.

4.72 moles.

30

215.15 K is ________ degrees C.

-58.00.

40

This element has a molar mass of 15.999 g/mol.

Oxygen (O).

40

The structure of a neutral Nitrogen-15 atom.

7 protons and 8 neutrons in the nucleus with 7 electrons.

40

The density of a substance is 1.63 grams per milliliter. What is the mass of 0.25 liters of the substance in grams?

m = 0.4075 g

40

How many atoms of gold are in 1 gram of gold?



196.96 x 6.023x10^23 = 1.18x10^26 atoms.

40

Density, melting point, malleability, hardness, and color are all examples of _______ properties.

physical.

50

2 Parts! The elements Fluorine, Chlorine, Bromine, Iodine, and Astatine all belong to the ________ family (common name NOT Group #) and all have similar _________ properties.

Halogen and chemical.

50

The mass of one atom of Na is ____________(g).

3.8177x10^(-23)g.

50

Which of the following is greater?
a. 7.8 grams per milliliter or 4.1 μg/μL
b. 3 x 10-2 kilograms/centimeters3 or 3 x 10-1 milligrams/centimeter3

a
50

How many moles of oxygen (O) are in 1 mole of calcium carbonate (CaCO3)?



3 moles

50

Percent abundance of isotopes of a given element are calculated by dividing __________ by ______________ and then multiplying by 100. (several words for each blank)

'The number of atoms for a given isotope' and ' The number of atoms for all isotopes'.