chemistry - unit 5 (covalent): semester 1

what is nomenclature?

• name chemical compounds

• writing chemical compounds

element >

composed of one type of atom

what are elements represented by?

symbol which consists of only one capital letter 

what is an example of an element? 

Na - sodium 

compound >

composed of two or more elements

what are compounds represented by?

a formula which consists of 2 or more element symbols written next to each other

monatomic structures > 

composed of one atom 

diatomic structures >

composed of two atoms

polyatomic structures >

composed of more than two atoms

binary compound > 

composed of two elements 

ternary compound >

compound composed of three elements

binary molecular (covalent) bonding >

a bond between two non-mentals

a _______ of electrons 

sharing

what is a covalent bond at room temperature?

mostly gas or liquids at room temperature and pressure with some soft solids

where is a prefix added to the name?

on the first element if more than one atom is present and always on the second atom

mono >

1

di >

2

tri >

3

tetra >

4

penta >

5

hexa >

6

hepta > 

7

octa >

8

nona >

9

deca > 

10 

what will the second element also use?

it will used the root form of its name ending in -ide

hyrdro >

H

carb >

C

nitr >

N

ox >

O

fluor > 

F

sulf >

S

selen >

Se

brom > 

Br

iod >

I

astat >

At

phosph > 

P

chlor >

Cl