Unit 2 Matter and Energy

All atoms have a ___________ in the center.

• electron
• cloud
• nucleus
• particle

The nucleus of the atom has  the 
___________ and ___________ in it.

• protons and neutrons
• electrons and neutrons
• protons and electrons

A proton has a ___________ charge.

• positive
• negative
• neutral

The electrons are in the electron _________.

• region
• area
• cloud

An electron has a ___________ charge.

• positive
• negative
• neutral

What so the blue circles represent?

• protons
• neutrons
• electrons
• nucleus

What do the red circles represent?

• protons
• neutrons
• electrons
• nucleus

What do the black circles represent?

• protons
• neutrons
• electrons
• nucleus

What do the red and blue circles represent?

• protons
• neutrons
• electrons
• nucleus

If you want to know the Atomic # of an element, you need to count the __________.

• neutrons
• protons
• electron cloud rings