Final Chemistry Unit 3 Review

Which of the following is not evidence of a new substance?

• temperature change

• liquid disappears when poured into another

• gas production

• solid formation

How many elements are in this Carbon dioxide molecule?

• 3

• 2

• 1

• 0

Tags

NGSS.MS-PS1-1

If a solid is added to water and then a gas is given off, it is evidence of

• chemical change occurring

• a new product forming

• atoms rearranging

• all are true

Tags

NGSS.MS-PS1-5

NGSS.MS-PS1-2

How many molecules are in this formula?

• 1

• 2

• 3

• 6

Tags

NGSS.MS-PS1-1

What information does a subscript number tell us?

• the number of atoms per element

• the number of molecules per formula

Tags

NGSS.MS-PS1-1

How many molecules are in the Reactant?

• 1

• 2

• 3

• 4

Tags

NGSS.MS-PS1-1

What information does the coefficient in an equation give us?

• the number of atoms per element

• the number of molecules per formula

The center of an atom is called

a/an __________.

• atomic mass

• nucleus

• proton center

• energy shell

Tags

NGSS.MS-PS1-1

Which formula has 6 atoms of Carbon, 12 atoms of Hydrogen, and 6 atoms of Oxygen.

• 
• 
• 
• 

Tags

NGSS.MS-PS1-1

The atomic number of an element is determined by the _________ of ________ in the nucleus.

• protons, neutrons

• number, electrons

• electrons, protons

• number, protons