How many protons are in Zirconium (Zr) ?

• 40
• 91
• 30
• 65

Tags

NGSS.MS-PS1-1

What is the mass number for Copper?

• 63

• 29

• 34

• 92

How many electrons does Cu⁴⁺ have?

• 29

• 33

• 25

• 30

Tags

NGSS.MS-PS1-1

How many electrons does S^2- have?

• 16
• 18
• 14
• 12

Tags

NGSS.MS-PS1-1

A proton is....

• A negatively charged subatomic particle
• A positively charged subatomic particle
• A neutrally charged subatomic particle
• The only subatomic particle located in the nucleus

A neutron has a charge of

• +2
• No charge
• -1
• +1

What does the mass number tell you?

• The number of electrons and protons

• The number of neutrons

• The number of protons and neutrons

• The number of protons.

An element's identity is determined by the number of

• electrons.
• protons.
• neutrons.
• valence.

The number of protons is equal to 

• the atomic number
• the number of neutrons
• the energy levels
• the periodic table groups

Tags

NGSS.MS-PS1-1

What is the mass number of Neon?

• 10

• 20.18

• 10.18

• 20