11/22 deca

deca = 10
decadale
decade
decaf

11/21 nona

nona = 9
nonagon
nonacid
nonacting

11/18 octo

octo = 8
octogon
octonary
octoploid

11/17 hept

hept = seven
heptachlor
heptad
heptose

11/16 hex

hex = six
hexagon
hexapod
hexanes

11/15 penta

penta = five
pentap
pentar
pentav

11/11 tri

tri = three
triable
triad
trial

11/10 di

di = two
diabase
diabasic
diabolism

11/9 mono

mono = one
monocarps
monoacid
monochord

11/8

Neon
Ne
10

Calcium
Ca
20

11/7

Fluorine
F
9

Potassium
K
19

11/4

Oxygen
O
8

Argon
Ar
18

11/3

Nitrogen
N
7

Chlorine
Ci
17

11/1

Carbon
C
6


Sulfer
S
16

11/1

Boron
5
B

Phosphorus
15
P