Unit 3: 3.3

Question 1

• # of protons in the nucleus
• on the periodic table
• bottom number to the left of element symbol

Answer 1

Atomic number (Z)

Question 2

• sum of the protons and neutrons in the nucleus
• NOT on the periodic table
• top number to left of element symbol

Answer 2

Mass number (A)

Question 3

An atom has ______ (it is neutral)

Answer 3

No charge

Question 4

An atom has the same amout of ______ and _______

Answer 4

Protons and electrons

Question 5

Atom that has the same number of protons as another atom of the same element but has a different number of neutrons

Answer 5

Isotope