Atoms & Elements

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 

True or False? Neutrons have a negative charge

• True

• False

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

• 2

• 1

• 3

• 6

The subatomic particle with a negative charge is the

• electron
• proton
• neutron
• nucleus 

What does the atomic number represent?

• the number of protons and usually electrons too

• the number of protons and neutrons

• the number of neutrons

How many protons does the element in this image contain?

• 14

• 7

• 15

• 18

Where are electrons of an atom found?

• Nucleus
• Electron Cloud
• Some are in the nucleus and some in the electron cloud.
• They are moving everywhere.

The mass of an atom come from the...

• electrons

• nucleus

• protons

• empty space

What two subatomic particles are contained in the nucleus?

• Protons + Electrons

• Neutrons + Electrons

• Atoms

• Protons + Neutrons