Chemistry Definitions

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Isotope
Atoms of same element with different number of neutrons
1 of 7
Atomic (proton) number
Number of protons in the nucleus of an atom
2 of 7
Mass (nucleon) number
Number of particles (proton + neutron) in the nucleus
3 of 7
Ion
Positively or negatively charge atom or (covalently bonded) group of atoms (a molecular ion)
4 of 7
Relative Isotopic mass
Mass of an atom of an isotope compared with 1/12 of the mass of an atom of carbon-12
5 of 7
Relative Atomic Mass (Ar)
Weight mean mass of an atom of an element compared with 1/12 of the mass of an atom of carbon-12
6 of 7
Relative Molecular Mass (Mr)
Weight mean mass of a molecule compared with 1/12 of the mass of an atom of carbon-12
7 of 7

Other cards in this set

Card 2

Front

Number of protons in the nucleus of an atom

Back

Atomic (proton) number

Card 3

Front

Number of particles (proton + neutron) in the nucleus

Back

Preview of the back of card 3

Card 4

Front

Positively or negatively charge atom or (covalently bonded) group of atoms (a molecular ion)

Back

Preview of the back of card 4

Card 5

Front

Mass of an atom of an isotope compared with 1/12 of the mass of an atom of carbon-12

Back

Preview of the back of card 5
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