Subscripts, Roman Numerals, & Diatomics, Decimal Multipliers for SI Prefixes, Rounding

one - subscript

mono

two - subscript

di

three - subscript

tri

four - subscript

tetra

five - subscript

penta

six - subscript

hexa

seven - subscript

hepta

eight - subscript

octa

nine - subscript

nona

ten - subscript

deca

one - roman numeral

I

two - roman numeral

II

three - roman numeral

III

four - roman numeral

IV

five - roman numeral

V

six - roman numeral

VI

seven - roman numeral

VII

eight - roman numeral

VIII

nine - roman numeral

IX

ten - roman numeral

X

mercury (I) cation

Hg₂²⁺

mercury (II) cation

Hg²⁺

diatomic elements

H₂ N₂ F₂ O₂ I₂ Cl₂ Br₂

helium valence e-

2

special metals with 2+ fixed charge

Zn Cd

special metals with 3+ fixed charge

Al Sc

special metals with 1+ fixed charge

Ag

tera

trillions (10¹²), T

giga

billions (10⁹), G

mega

millions (10⁶), M

kilo

thousands (10³), k

deci

tenths (10^-1), d

centi

hundredths (10^-2), c

milli

thousandths (10^-3), m

micro

millionths (10^-6), μ

nano

billionths (10^-9), n

pico

trillionths (10^-12), p

atomic number

# of protons inside nucleus

• on bottom left on element

• “Z”

mass number

# of particles (protons and neutrons) inside the nucleus

• on top left of element

• or seen as element - #

• “A”

row 1 (IA) on PT

alkali metals

row 2 (IIA) on PT

alkaline earth metals

row 15 (VA) on PT

prictogens

row 16 (VIA) on PT

chalogens

row 17 (VIIA) on PT

halogens

row 18 (VIIIA) on PT

noble gases