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Chemistry - AQA
Elements
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Chemistry
Chemistry - AQA
Elements
Isotopes
Atomic Number
9th
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20 Terms
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1
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What do elements consist of
Atoms with the same atomic number
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What determines what type of atom it is
The number of protons in nucleus
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What can atoms have different numbers of
Protons, neutrons and electrons
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Symbol for Carbon
C
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Carbon 13 formation
6 protons, 6 electrons, 7 neutrons
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Carbon 12 formation
6 protons, 6 electrons, 6 neutrons
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Example of elements with isotopes
Copper
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Isotope mass number
Mass number of the atom
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Abundance
the ratio of the number of atoms of a specific isotope of an element to the total number of isotopes present
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Isotopes
Different forms of the same element, same number of protons, different number of neutrons
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Relative atomic mass calculation
sum of (isotope abundance x isotope mass number ) /100
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Atoms with two protons name
Helium
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Atom with one proton name
Hydrogen
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Number of elements
About 100
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symbol for lead
Pd
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symbol for iron
Fe
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symbol of sodium
Na
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symbol for magnesium
Mg
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Symbol for Oxygen
0
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Symbol for Hydrogen