Match the terms with the correct definitions: Question 1 options:

formed of only one type of atom

smallest particle of basic matter

is a combination of two or more atoms stuck together

has mass and takes up space

1.
matter

2.
atom

3.
molecule

4.
element

Question 2 (1 point)
Look at this picture of carbon dioxide. What are the things in the picture? Check all that apply.

particles of carbon dioxide. One carbon and 2 oxygens bonded together.

Question 2 options:

Molecules

Atoms

Compounds

Elements

Question 3 (1 point)
Which of the following is an example of a compound?

Question 3 options:

Iron - Fe

Carbon dioxide - CO2

Hydrogen - H2

Oxygen - O2

Question 4 (1 point)
Different elements always have different numbers of

Question 4 options:

electrons

nuclei

protons

neutrons

The atomic number tells us the

Question 5 options:

Atomic mass

Number of neutrons

Number of electrons

Number of protons

Question 6 (1 point)
Here are the first 20 elements on the periodic table. Which element has 10 protons?

ATOMIC NUMBER

ELEMENT

ATOMIC MASS

1

Hydrogen

1.008