Science 9 - Chapter 3 Chem

K2S

2 potassium

1 sulfur

Co2O3

2 colbalt

3 oxygen

NaCH3COO

1 sodium

2 carbons

3 hydrogen

2 oxygen

Ca3(PO4)2

3 calcium

2 phosphorus

8 oxygen

3 Sr(HSO3)2

3 strontium

6 hydrogen

6 sulfur

18 oxygen

how are ionic compounds formed

metals + non metals

how are covalent electrons formed

non metal + non metal

metals ___ electrons

lose

non metals ___ electrons

gain

what do u do to a ion bohr model

add brackets

covalent compounds ____ electrons

share

what do u change when writing the name of a formula

change the ending to “-ide”

most important thing to do

check the charges

sodium chloride

NaCl

Sodium Oxide

Na2O

Aluminum Chloride

AlCl3

Aluminum oxide

Al2O3

LiF

Lithium Flouride

CaCl

Calcium Chloride

what do u do when naming a formula with multiple charges

add roman numerals

CrO

Chromium (ii) oxide

VO2

vanadium (iv) oxide

Ni2S3

nickel (iii) sulphide

iron (ii) fluoride

FeF2

Titanium (iii) oxide

Ti2O3

what is precipitate

a solid formed in a liquid

chemical change

makes new substance

physical change

no new substance

both chemical n physical changes involve?

energy changes

what does exothermic do

energy is released

what does endothermic energy do

energy absorbed

how to tell exothermic change

burning of chemicals

light, heat n sound released

starting materials are..

reactants

the new substance is

product