Important Chemistry Formulas
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11 Terms
Mass
The total number of protons and neutrons in an atom.
Average atomic mass
Calculated using the formula: (% abundance * atomic mass of isotope) + (% abundance * atomic mass of isotope).
Density
The mass of an object divided by its volume, represented as density = mass/volume.
Percent error
A measure of how inaccurate a measurement is; calculated as |Measured value - Accepted value| / Accepted value * 100.
Half-life
The time required for half of the original mass of a substance to decay.
m2
The mass remaining after a certain time period has elapsed in the context of half-life calculations.
m1
The original mass of a substance before decay.
t2
The time elapsed during the decay process.
t1
The half-life of the substance.
Half life formula
m2= m1(1/2)(t2/t1)
How many orbitals and electrons are in the s, p, d, and f regions?
s: 1 orbital, 2 electrons.
p: 3 orbitals, 6 electrons.
d: 5 orbitals, 10 electrons.
f: 7 orbitals, 14 electrons.
Flashcards (33)