Midterm Terms

Question 1

Compound V.S. Mixture

Answer 1

Compound is one substance composed of 2 or more types of atoms
Mixture is composed of 2 or more substances

Question 2

Distillation

Answer 2

Separate substances dissolved in a liquid by boiling off one or more liquids in the mixture

Question 3

Dalton

Answer 3

Tiny particles called atoms
Atoms are indivisible
Atoms of 1 element can combine with another to form a compound
A given compound always has the same relative # and types of atoms

Question 4

JJ Thompson

Answer 4

CRT experiment
Plum pudding model

Question 5

Ernest Rutherford

Answer 5

Gold Foil experiment
Nucleus is small, dense, and positively charged and rest of atom is largely empty space

Question 6

Niels Bohr

Answer 6

Planetary model

Question 7

Modern Theory

Answer 7

Electron cloud

Question 8

Average atomic mass

Answer 8

(weight of isotope)(relative %) + (weight of isotope)(relative %) + …

Question 9

Aufbau’s Rule

Answer 9

Electrons only occupy higher sublevels after all the orbitals on the one below are full

Question 10

Pauli Exclusion principle

Answer 10

Electrons in the same orbital can’t have the same spin

Question 11

Hund’s rule

Answer 11

Electrons will only pair up once each orbital has at least one electron