Atomic and mass numbers

What is the atomic number?

• the number of protons
• the number of protons and neutrons
• the number of neutrons
• the number of protons and electrons

What is the mass number defined as?

• the number of protons
• the number of protons and neutrons
• the number of neutrons
• the number of protons and electrons

Tags

NGSS.HS-PS1-8

What is the atomic number of this atom?

• 1
• 3
• 4
• 7

Tags

NGSS.MS-PS1-1

What is the mass number of this atom?

• 1

• 3

• 4

• 7

Tags

NGSS.MS-PS1-1

An element has the mass number 12 and atomic number 6. The number of neutrons in it is:

• 6

• 10

• 4

• 8

Tags

NGSS.MS-PS1-1

If an atom has 10 electrons, how many protons does it have?

• 0

• 1

• 10

• 5

Tags

NGSS.MS-PS1-1

Anything that has mass and takes up space

• atom

• element

• matter

• molecule

equal to the number of protons plus neutrons in the nucleus of an atom

• atomic mass

• atomic number

• isotope

• valence electrons

Which of the following states of matter has a definite volume and a definite shape?

• solid

• liquid

• gas

• plasma

Which state of matter takes the shape of the container that it is in?

• solid

• liquid

• gas

• plasma