seven protons and seven electrons

ten protons and ten electrons

ten protons and twenty electrons

twenty protons and twenty electrons

H and the atomic number 1.

He and the atomic number 2.

Ge and the atomic number 32.

Hg and the atomic number 80.

28

14

6

8

A small, finite variety of atoms make up a nearly infinite variety of molecules.

A nearly infinite variety of atoms make up a small, finite variety of molecules.

A small, finite variety of atoms make up a small, finite variety of molecules.

A nearly infinite variety of atoms make up a nearly infinite

variety of molecules.

They are all made of atoms.

They are in the same state of matter.

They have the same chemical properties.

They have the same physical properties.

14

9

6

2

1 hydrogen atom, 1 sodium atom, 3 carbon atoms, and 3

oxygen atom.

1 sodium atom, 1 hydrogen atom, 1 carbon atom, and 3 oxygen atoms.

1 potassium atom, 1 helium atom, 1 carbon atom, and 1 oxygen atom.

1 carbon atom, 1 helium atom, 1 calcium atom, and 3 oxygen atoms.

6

1

4

2

semiliquid at room temperature.

liquid at room temperatures.

gases at room temperature.

solid at room temperature.

an oxygen molecule.

an oxygen compound.

an oxygen atom.

an oxygen mixture.

an element made of three atoms, 2 hydrogen and 1 oxygen.

a solution made of two compounds, 2 hydrogen and 1 oxygen.

an atom made of two compounds, 2 hydrogen and 1 oxygen.

a molecule made of three atoms, 2 hydrogen and 1 oxygen.

9

3

5

28

carbon, helium, and oxygen.

calcium, hydrogen, and osmium.

carbon, hydrogen, and oxygen.

calcium, helium, and osmium.

1

8

10

4

atom

electron

neutron

nucleus

able to be separated.

made up of only one type of atom.

composed of different types of atoms combined together.

always in a liquid state at room temperature.

protons, neutrons, and isotopes

neutrons, isotopes, and electrons

positives, negatives, and electrons

protons, neutrons, and electrons

in Group 1

in Period 3

on the opposite side of the periodic table

at elements whose symbols begin with the letter N

0

1

2

3

1 calcium atom, 1 carbon atom, and 3 oxygen atoms

1 calcium atom, 1 carbon atom, and 1 oxygen molecule

1 calcium molecule, 1 carbon molecule, and 3 oxygen atoms

1 calcium molecule, 1 carbon molecule, and 1 oxygen molecule

molecules that formed elements

molecules that formed atoms

atoms that formed molecules

atoms that formed elements

elements breaking down into atoms

molecules breaking down into atoms

atoms breaking down into molecules

elements breaking down into molecules

Potassium, which shares similar properties with sodium, will explode in water.

Potassium, which shares similar properties with sodium, will not explode in water.

Potassium, which does not share similar properties with sodium, will explode in water.

Potassium, which does not share similar properties with sodium, will not explode in water.

liquids.

metals.

metalloids.

non-metals.

model 1 and model 4

model 2 and model 3

model 2 and model 4

model 1 and model 3

Only some elements are composed of atoms with electrons.

Only some elements have atoms with subatomic particles.

The atoms of different elements have different locations for their nucleus.

The atoms of different elements have different numbers of protons and electrons.

They have properties of both metals and nonmetals.

They are the only man-made elements.

They are the only naturally occurring elements.

They all have the same number of protons and neutrons.

1

2

4

5

3 molecules from 45 elements

45 molecules from 3 atoms

45 atoms from 3 elements

3 atoms from 45 molecules

osmium

potassium

selenium

sulfur

tin