Chemistry Need-to-Memorize

Giga

G, 10^9

mega

M, 10^6

kilo

k, 10^3

deci

d, 10^-1

centi

c, 10^-2

milli

m, 10^-3

micro

µ, 10^-6

nano

n, 10^-9

pico

p, 10^-12

femto

f, 10^-15

Farenheit Dimensional Analysis Equation

T (in ºF) = (9/5) (T(in ºC) + 32)

Celsius Dimensional Analysis Equation

T(in ºC)= (5/9) [T(in ºF) - 32]

kelvin Dimensional Analysis Equation

T(in K)= T(in ºC) + 273.15

1 inch is how many cms?

2.54cm

1kg is how many lb?

2.205 lb

1mL is how many cm?

1cm^³

1ft is how many inches?

12 in

1yd is how many ft?

3 ft

What are the 5 sig fig rules

1. All nonzero digits are significant

2. Zeroes between other sigfigs are significant

3. Leading zeroes, which are only used to show the position of the decimal point, are not significant

4. Final zeroes in a= a number that has a decimal point are significant

5. Final zeroes in a number with no decimal points are not considered significant

SI Unit of charge

Coulomb (C)

Proton abbreviation

p, ¹H⁺, H⁺ or, p⁺

Neutron abbreviation

n

Electron abbreviation

e^-

Proton Mass (amu)

1.00727

Neutron Mass (amu)

1.00866

Neutron Charge (C)

0

Proton Charge (relative)

+1

Neutron Charge (relative)

0

Electron Charge (relative)

-1

Protons are located in the. . .

nucleus

Neutrons are located in the. . .

nucleus

Electrons are located in the. . .

outside the nucleus in a cloud “electron cloud”

Atomic Number

Z, the number of protons in an atom

Mass Number

A, The total number of protons and neutrons in an atom

Isotopes

atoms of the same element that have different mass numbers

How do I format writing Isotopes?

Cations

Positively charged ions, #p >#e^-, positively charged

Anions

Negatively charged ions, #p < #e^-, negatively charged

Atom

the smallest identifiable unit of an element, #p = #e^-, neutral

Atomic mass units (amu) are also known as . . .

Daltons (Da)

How much is 1 amu?

1 amu = 1/12^th of a Carbon-12 atom, 1amu= 1.660539 × 10²⁷ kg

Atomic weight

The weighted average of the isotopic masses of the element’s naturally occurring isotopes

How do you find the weighted average?

(Isotopic Abundance * Isotopic Mass) + ((Isotopic Abundance * Isotopic Mass)

Silver

Ag

Aluminium

Al

Argon

Ar

Arsenic

As

Gold

Au

Boron

B

Barium

Ba

Beryllium

Be

Bromine

Br

Carbon

C

Calcium

Ca

Chlorine

Cl

Cobalt

Co

Chromium

Cr

Cesium

Cs

Copper

Cu

Fluorine

F

Iron

Fe

Gallium

Ga

Germanium

Ge

Hydrogen

H

Helium

He

Mercury

Hg

Iodine

I

Potassium

K

Krypton

Kr

Lithium

Li

Magnesium

Mg

Manganese

Mn

Molybdenum

Mo

Nitrogen

N

Sodium

Na

Neon

Ne

Nickel

Ni

Oxygen

O

Phosphorous

P

Lead

Pb

Platnium

Pt

Rubidium

Rb

Radon

Rn

Sulfur

S

Antimony

Sb

Scandium

Sc

Selenium

Se

Silicon

Si

Tin

Sn

Strontium

Sr

Tellurium

Te

Titanium

Ti

Uranium

U

Vanadium

V

Tungsten

W

Xenon

Xe

Zinc

Zn

H₂O

Dihydrogen monoxide, Molecular Compound