Atoms, Ions and Isotopes

The atomic number is equal to _.

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

Tags

NGSS.MS-PS1-1

What is the charge on a lithium atom that looses 1 electron?

• +1
• 0
• -1
• -2

Tags

NGSS.MS-PS1-1

What is the charge of this element

• 11

• -1

• +1

• 1

• 12

Tags

NGSS.HS-PS1-1

How many ELECTRONS does copper have if it has the following charge: Cu²⁺ ?

• 64

• 35

• 27

• 29

Tags

NGSS.MS-PS1-1

How many ELECTRONS will iron have if it has the following charge: Fe³⁺ ?

(a)  

Tags

NGSS.MS-PS1-1

How many PROTONS does nitrogen have if it has the following charge: N^3- ?

• 14

• 7

• 10

• 4

Tags

NGSS.MS-PS1-1

What is the number of neutrons?

• 34
• 79
• 45
• 35

Tags

NGSS.HS-PS1-8

How is carbon-12 different from carbon-14?

• They have a different number of protons
• they have a different number of electrons
• they have a different number of neutrons

Tags

NGSS.HS-PS1-8

The positive particles of an atom are 

• electrons 
• positrons 
• neutrons 
• protons 

Particles in an atom that are neutral and have no charge are 

• negatrons 
• electrons 
• neutrons 
• protons