Chemistry Unit Assessment

What is the periodic table used to display?

• famous scientists
• known chemical elements
• types of chemical and physical reactions

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

The number of protons in an element is...

• equal to the atomic number.
• the mass number minus the atomic number.
• the atomic number plus its ion charge.

The atomic mass of an element is...

• the number of protons in the nucleus.
• the number of neutrons in the nucleus.
• the number of protons and neutrons in the nucleus.

The atomic number of Oxygen is...

• 8
• 15.999
• 23.999

Tags

NGSS.MS-PS1-1

What is an element?

• A pure chemical substance
• A physical combination of two or more different substances
• A chemical combination of two or more different substances

What is a compound?

• A pure chemical substance
• A physical combination of two or more different substances
• A chemical combination of two or more different substances

Tags

NGSS.MS-PS1-1

What is a mixture?

• A pure chemical substance
• A physical combination of two or more different substances
• A chemical combination of two or more different substances

In which state of matter are particles moving the fastest?

• solid
• liquid
• gas

Tags

NGSS.MS-PS1-4

In which state of matter are particles rigid in a fixed pattern?

• solid
• liquid
• gas

True or False - Within matter, atoms are constantly in motion?

• True
• False

Tags

NGSS.MS-PS1-4