Unit 3 Practice Test

The positive particles of an atom are

• electrons

• positrons

• neutrons

• protons

The central region of an atom where its neutrons and protons are is its

• nucleus

• electron cloud

• core

• center

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

• negatrons

• electrons

• neutrons

• protons

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

• Proton
• Neutron
• Electron
• Quark

An atom with atomic number 6 would have how many protons

• 6

• 12

• 3

• cannot be determined

What is the number of protons that the element in this image contain?

• 14

• 7

• 15

• 18

How many protons does this isotope of titanium have?

• 48
• 22
• 26
• 70

How many neutrons does the isotope of lithium have?

• 8
• 3
• 4
• 5

How many electrons does a Copper atom have?

• 63
• 29
• 92
• 34

Isotopes of an element have a different number of...

• Protons

• Neutrons

• Electrons

• Mass