What does the atomic number tell us?

• number of protons
• number of neutrons

Vertical columns in the periodic table are called _________ of elements and have similar properties. 

• groups
• periods

A one or two letter abbreviation  used to represent an element is called a(n) ________

• chemical symbol
• element sign

Particles in an atom's nucleus that are neutral and have no charge are 

• megatrons. 
• electrons.
• neutrons.
• protons. 

Tags

NGSS.MS-PS1-1

An atom with atomic number 6 would have how many protons?

• 6
• 12
• 3
• cannot be determined 

Tags

NGSS.MS-PS1-1

What is the atomic number for an element with three protons?

• 2
• 1
• 3
• 6

What is the atomic symbol for sodium?

• Na
• So
• NaCl
• S

A negatively charged particle that moves around the nucleus is a(n)

• proton
• neutron
• electron
• quark

Tags

NGSS.MS-PS1-1

Most of the mass in an atom is concentrated in the

• electrons.
• nucleus.
• protons.
• empty space.

Tags

NGSS.MS-PS1-1

What charge does a proton have?

• Negative
• Positive
• Neutral
• Visa