The modern periodic table

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What is the atomic number?
The number of protons in the nucleus of an atom. Also known as a proton number
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What is the mass number?
The total number of protons and neutrons in the nucleus of an atom. Also known as the nucleon number.
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What is the relative atomic mass?
The mean mass of an atom relative to the mass of an atom of carbon-12, which is assigned a mass of 12
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What is a group in a periodic table?
A column in the periodic table, containing elements with similar properties
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What is a period in a period table?
Row in the periodic table in which the atomic number increases by one from one element to the next
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What is group 0 called?
Noble gases
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What is group 1 called?
Alkali metals
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What is group 7 called?
Halogens
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What are the metals called in the centre of the periodic table - without a group?
Transition metals
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What is an isotope?
Isotopes are different atoms of an element with the same number of protons and electrons but different numbers of neutrons.
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What is the relative abundance of an atom?
The number of objects of a particular kind in a sample shown as a percentage of the total number of objects in the sample
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Other cards in this set

Card 2

Front

What is the mass number?

Back

The total number of protons and neutrons in the nucleus of an atom. Also known as the nucleon number.

Card 3

Front

What is the relative atomic mass?

Back

Preview of the front of card 3

Card 4

Front

What is a group in a periodic table?

Back

Preview of the front of card 4

Card 5

Front

What is a period in a period table?

Back

Preview of the front of card 5
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