Exam (elaborations)
ATOMIC MASS QUESTIONS AND ANSWERS LATEST UPDATED
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Exam of 2 pages for the course Atom at Atom (ATOMIC MASS)
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ATOMIC MASSATOMIC NUMBER - answer the number of protons in an atom
ATOMIC MASS - answer Most of the mass of an atom is located in the nucleus.
MASS NUMBER - answer protons + neutrons
MASS of a PROTON - answer1 amu
OR
1.673 x 10⁻²⁴g
MASS of a NEUTRON - answer1 amu
OR
1.675 x 10⁻²⁴ g
MASS of an ELECTRON - answer The mass of an electron is 1/2000th of a proton
ATOMIC MASS UNIT - answerDefinition:
1/12 the mass of a carbon-12 atom
Abbreviation:
amu
MASS NUMBER - answerProtons + Neutrons = Mass Number
EQUATION:
P + N = Am
How to find the number of NEUTRONS in an atom - answerFor NEUTRAL ATOMS:
1. Atomic Mass - Protons = Neutrons
Am - P = N
OR
2. Atomic Mass - Electrons = Neutrons
Am - E = N
OR
3. Atomic Mass - Atomic Number = Neutrons
Am - An = N
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