Ch 3: Atoms & Compounds

Question 1

What is the atomic mass equation

Answer 1

of protons
+
# of neutrons
____________
Atomic Mass

Question 2

Who has achieved the octet rule?

Answer 2

Noble Gases

Question 3

of electrons in outer shell / energy level
determines chemical reactivity

Answer 3

Valence

Question 4

How many electrons are needed to achieve octet rule

Answer 4

8

Question 5

Smallest unit of a chemical element

Answer 5

Atom

Question 6

Region of molecule posing negative and positive charge
Makes water “sticky”

Answer 6

Dipole

Question 7

Substances that can’t be divided by chemical means

Answer 7

Elements

Question 8

Substances composed of 2+ elements chemically united

Answer 8

Compound

Question 9

Atoms of the same elements that have different atomic masses

Answer 9

Isotopes

Question 10

____ has positive charge particles. _____ has neutral particles and stabilizes atoms

Answer 10

Proton / Neutron

Question 11

Electrostatic interaction between ions with opposing changes

Answer 11

Ionic bonds

Question 12

Based on valence / atomic species share electrons

Answer 12

Covalent bonds

Question 13

What is a polar covalent bond?

Answer 13

Covalent bonded with partial ionic character