Beginning of Chap. 2

Question 1

Charge, mass, and abbreviation of:
Electron
Proton
Neutron

Answer 1

negative, v. small, e-

positive, 1 amu, p

None, 1 amu, n

Question 2

Atomic Number abbreviation and significance?

Answer 2

Z, # of protons (determines the element)

Question 3

Atomic Mass abbreviation and significance?

Answer 3

A, # of protons & neutrons

Question 4

Notation for an element?

Answer 4

A/Z X

Question 5

What are isotopes of an element?

Answer 5

Same number of protons, different number of neutrons, so different mass

Question 6

Significant figure rules?

Answer 6

All nonzero
Zero between nonzero digits
Zero if to the right of a decimal point and right of a non-zero number