Ch 2 Atoms & Molecules

Question 1

Electron

Answer 1

Negatively charged sub particle

Question 2

Proton

Answer 2

Positively charged sub particles found in the nucleus

Question 3

Isotopes

Answer 3

An element with different masses

Question 4

Neutrons

Answer 4

uncharged subatomic particles

Question 5

What makes an Isotope?

Answer 5

A different number of neutrons within elements

Question 6

Atomic Mass Unit (amu)

Answer 6

Units used to measure atoms

Question 7

Atomic Number

Answer 7

The number of protons in the nucleus

Question 8

Mass Number

Answer 8

The total number of protons & neutrons

Question 9

Anion

Answer 9

An ion with a negative charge

Question 10

Cation

Answer 10

An ion with a positive charge

Question 11

Average Mass Formula

Answer 11

Average Mass = ( Atomic Mass A * % of Isotope A) + (Atomic Mass B * % of Isotope B)

Question 12

Molecular Formula vs Structural Formula

Answer 12

Ex: H2O vs H–O–H

Question 13

Period/Series

Answer 13

Rows on the periodic table

Question 14

Groups

Answer 14

Columns on the periodic table

Question 15

Properties of Metals

Answer 15

shiny, malleable, good conductors of heat & electricity

Question 16

Properties of Nonmetals

Answer 16

Appear dull, poor conductors of heat & electricity

Question 17

Properties of Metalloids

Answer 17

Conducts heat & electricity relatively well, brittle, possesses properties of metals and nonmetals

Question 18

Alkali Metals

Answer 18

Elements in group 1
ex: Li, Na, etc

Question 19

Alkaline Earth Metals

Answer 19

Elements in group 2
Ex: Mg, Be, Ca, etc

Question 20

Pnictogens

Answer 20

Group 15
Ex: N, P, As, etc

Question 21

Chalcogens

Answer 21

Group 16
Ex: O, S, Se, etc

Question 22

Halogens

Answer 22

Group 17
Ex: F, Br, I, Cl, etc

Question 23

Noble Gases (Inert Gases)

Answer 23

Group 18
Ex: Ne, Ar, Kr, etc

Question 24

Ionic Bonds

Answer 24

electrostatic attraction between oppositely charged ions where an element steals electrons from another element

Question 25

Covalent Bonds

Answer 25

When elements share their electrons

Question 26

Binary Compounds

Answer 26

Containing two elements

Question 27

Naming Ionic Compounds (Metals + Nonmetal)

Answer 27

Keep the name of Metal, Remove ending of Nonmetal and replace w/ -ide
1. Sodium Chloride
2. Calcium Iodide
3. Potassium Bromide

Question 28

Naming 2 Nonmetals

Answer 28

Ex: NF3 = Nitrogen trifluoride

Question 29

Naming Binary Acids

Answer 29

If it contains H+ followed by an anion, it will start with hydro and end with -ic
1. HF = hydrofluoric acid
2. HBr = hydrobromic acid