Elements of Life keywords

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Atomic Number
The number of protons and neutrons in the nucleus of an atom
1 of 12
Mass number
The number of protons and neutrons in nucleus of an atom
2 of 12
Isotope
Atoms of the same element with a different number of neutrons in the nucleus and hence with a different mass number
3 of 12
Avogadro's constant
6.02 x 10^23 , the number of particles in 1 mole of a substance
4 of 12
Relative isotopic mass
The mass of an atom of an isotope compared with one-twelfth of the mass of an atom of carbon-12
5 of 12
Relative atomic mass
The weighted mean mass of an atom of an element compared with one-twelfth of the mass of an atom of Carbon-12
6 of 12
Relative formula mass
The weighted mean mass of a formula unit compared with one-twelfth of the mass of an atom of Carbon-12 (add together the Ar values of each atom in the formula)
7 of 12
Relative molecular mass (Mr)
The weighted mean mass of a molecular compound compared with one-twelfth of the mass of an atom of Carbon-12
8 of 12
Half life
The time it takes for half the radioactive nuclei in a sample to decay
9 of 12
Nuclear fusion
A nuclear reaction in which smaller atomic nuclei fuse to form a heavier nuclei which releases energy
10 of 12
Absorption spectra
Black lines on a coloured background corresponding to the absorptions of energy by the electrons
11 of 12
Emission spectra
Coloured lines on a black background seen when a chemical burns with a coloured flame
12 of 12

Other cards in this set

Card 2

Front

The number of protons and neutrons in nucleus of an atom

Back

Mass number

Card 3

Front

Atoms of the same element with a different number of neutrons in the nucleus and hence with a different mass number

Back

Preview of the back of card 3

Card 4

Front

6.02 x 10^23 , the number of particles in 1 mole of a substance

Back

Preview of the back of card 4

Card 5

Front

The mass of an atom of an isotope compared with one-twelfth of the mass of an atom of carbon-12

Back

Preview of the back of card 5
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