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Flashcards in 4.2 Deck (29)
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1

Covalent compound

Non-metal + non-metal

2

Ionic compound

Metal + non-metal

3

How to get Mass number

Protons + neutrons

4

How to get neutrons

Mass number - protons....
(Round the mass number)

5

Rules for naming ionic compounds

1. Non-metal always ends in “ide” suffix
2. Metals always go first, non-metals second
3. Metal uses its full name

6

Rules for writing chemical formulas

1. Identify charge for ions
2. Determine if charges are balanced
3. If charges are balanced, count # of ions for formula
4. If charges are not balanced, then balance charges and go to #3

7

Rules for naming ionic compounds with multitalented metals

1. Metals always comes first
2. Non-metals go second with “ide” suffix
3. If metal is multitalented use Roman numerals
4. Non-metals NEVER have Roman numerals

8

Polyatomic ions

Groups of atoms covalently bonded together

Act as a single unit when forming compounds

9

Rules for naming ionic compounds with polyatomic ions

1. Positive ion named first
2. Negative ion named 2nd
3. Single elements follow previous naming system
4. Poly ions use theirs and scientific name

10

Mono

1

11

Di

2

12

Tri

3

13

Tetra

4

14

Penta

5

15

Hexa

6

16

Hepta

7

17

Octa

8

18

Nona

9

19

Deca

10

20

Rules for writing covalent compounds

1. First non-metal uses its full name, second non-metal has “ide” suffix
2. Second non-metal always has prefix
3. First non-metal has prefix if more than 1 atom

21

CH
4

Methane

22

NH
3

Ammonia

23

CO
2

Carbon dioxide

24

H O
2

Dihydrogen monoxide
AKA water

25

H PO
3. 4

Phosphoric acid

26

HCl

Hydrochloric acid

27

H. SO
2. 4

Sulphuric acid

28

Diatomic molecules

H O F Br I N Cl

29

Subscript

The small number written to the right of a symbol