Biochemistry 137

What type of charge does a proton have?

• negative

• postive

• no charge/neutral

What type of charge does an electron have?

• positive

• no charge/neutral

• negative

What is the center of the atom called?

• nucleus

• electron cloud

• energy level

• neutron

What two sub-atomic particles belong in the nucleus of an atom?

• electrons and protons

• protons and neutrons

• electrons and neutrons

The number of neutrons in an atom =

• protons - neutrons

• mass number - protons

• protons - neutrons

• mass number - electrons

Where are electrons located in an element?

• nucleus

• energy levels

The number of electrons in an atom is found by the

• protons

• atomic number

• protons and atomic number

• none

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

What is the atomic mass of "F"

• 9
• 18
• 17
• 19