Elements and Properties

The properties of all the elements up to krypton, including name, symbol, GCSE electron configuration, AS electron configuration, atomic mass, atomic number, number of protons, neutrons and electrons, period and group number.

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Hydrogen

Chemical symbol: H

Group: 1

Period: 1

Atomic number: 1

Relative atomic mass (Ar): 1.0

Protons: 1

Neutrons: 0

Electrons: 1

GCSE configuration: [1]

A Level configuration: 1s1

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Helium

Chemical symbol: He

Group: 0

Period: 1

Atomic number: 2

Relative atomic mass (Ar): 4.0

Protons: 2

Neutrons: 2

Electrons: 2

GCSE configuration: [2]

A Level configuration: 1s2

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Lithium

Chemical symbol: Li

Group: 1

Period: 2

Atomic number: 3

Relative atomic mass (Ar): 6.9

Protons: 3

Neutrons: 4

Electrons: 3

GCSE configuration: [2,1]

A Level configuration: 1s2 2s1

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Beryllium

Chemical symbol: Be

Group: 2

Period: 2

Atomic number: 4

Relative atomic mass (Ar): 9.0

Protons: 4

Neutrons: 5

Electrons: 4

GCSE configuration: [2,2]

A Level configuration: 1s2 2s2

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Boron

Chemical symbol: B

Group: 3

Period: 2

Atomic number: 5

Relative atomic mass (Ar): 10.8

Protons: 5

Neutrons: 6

Electrons: 5

GCSE configuration: [2,3]

A Level configuration: 1s2 2s2 2p1

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Carbon

Chemical symbol: C

Group: 4

Period: 2

Atomic number: 6

Relative atomic mass (Ar): 12.0

Protons: 6

Neutrons: 6

Electrons: 6

GCSE configuration: [2,4]

A Level configuration: 1s2 2s2 2p2

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Nitrogen

Chemical symbol: N

Group: 5

Period: 2

Atomic number: 7

Relative atomic mass (Ar): 14.0

Protons: 7

Neutrons: 7

Electrons: 7

GCSE configuration: [2,5]

A Level configuration: 1s2 2s2 2p3

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Oxygen

Chemical symbol: O

Group: 6

Period: 2

Atomic number: 8

Relative atomic mass (Ar): 16.0

Protons: 8

Neutrons: 8

Electrons: 8

GCSE configuration: [2,6]

A Level configuration: 1s2 2s2 2p4

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Flourine

Chemical symbol: F

Group: 7

Period: 2

Atomic number: 9

Relative atomic mass (Ar): 19.0

Protons: 9

Neutrons: 10

Electrons: 9

GCSE configuration: [2,7]

A Level configuration: 1s2 2s2 2p5

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Neon

Chemical symbol: Ne

Group: 0

Period: 2

Atomic number: 10

Relative atomic mass (Ar): 20.2

Protons: 10

Neutrons: 10

Electrons: 10

GCSE configuration: [2,8]

A Level configuration: 1s2 2s2 2p6

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Sodium

Chemical symbol: Na

Group: 1

Period: 3

Atomic number: 11

Relative atomic mass (Ar): 23.0

Protons: 11

Neutrons: 12

Electrons: 11

GCSE configuration: [2,8,1]

A Level configuration: 1s2 2s2 2p6 3s1

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Magnesium

Chemical symbol: Mg

Group: 2

Period: 3

Atomic number: 12

Relative atomic mass (Ar): 24.3

Protons: 12

Neutrons: 12

Electrons: 12

GCSE configuration: [2,8,2]

A Level configuration: 1s2 2s2 2p6 3s2

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Aluminium

Chemical symbol: Al

Group: 3

Period: 3

Atomic number: 13

Relative atomic mass (Ar): 27.0

Protons: 13

Neutrons: 14

Electrons: 13

GCSE configuration: [2,8,3]

A Level configuration: 1s2 2s2 2p6 3s2 3p1

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Silicon

Chemical symbol: Si

Group: 4

Period: 3

Atomic number: 14

Relative atomic mass (Ar): 28.1

Protons: 14

Neutrons: 14

Electrons: 14

GCSE configuration: [2,8,4]

A Level configuration: 1s2 2s2 2p6 3s2 3p2

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Phosphorus

Chemical symbol: P

Group: 5

Period: 3

Atomic number: 15

Relative atomic mass (Ar): 31.0

Protons: 15

Neutrons: 16

Electrons: 15

GCSE configuration: [2,8,5]

A Level configuration: 1s2 2s2 2p6 3s2 3p3

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Sulphur

Chemical symbol: S

Group: 6

Period: 3

Atomic number: 16

Relative atomic mass (Ar): 32.1

Protons: 16

Neutrons: 16

Electrons: 16

GCSE configuration: [2,8,6]

A Level configuration: 1s2 2s2 2p6 3s2 3p4

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Chlorine

Chemical symbol: Cl

Group: 7

Period: 3

Atomic number: 17

Relative atomic mass (Ar): 35.5

Protons: 17

Neutrons: 19

Electrons: 17

GCSE configuration: [2,8,7]

A Level configuration: 1s2 2s2 2p6 3s2 3p5

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Argon

Chemical symbol: Ar

Group: 0

Period: 3

Atomic number: 18

Relative atomic mass (Ar): 39.9

Protons: 18

Neutrons: 22

Electrons: 18

GCSE configuration: [2,8,8]

A Level configuration: 1s2 2s2 2p6 3s2 3p6

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Potassium

Chemical symbol: K

Group: 1

Period: 4

Atomic number: 19

Relative atomic mass (Ar): 39.1

Protons: 19

Neutrons: 20

Electrons: 19

GCSE configuration: [2,8,8,1]

A Level configuration: 1s2 2s2 2p6 3s2 3p6 4s1

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Calcium

Chemical symbol: Ca

Group: 2

Period: 4

Atomic number: 20

Relative atomic mass (Ar): 40.1

Protons: 20

Neutrons: 20

Electrons: 20

GCSE configuration: [2,8,8,2]

A Level configuration: 1s2 2s2 2p6 3s2 3p6 4s2

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Scandium

Chemical symbol: Sc

Group: n/a

Period: 4

Atomic number: 21

Relative atomic mass (Ar): 45.0

Protons: 21

Neutrons: 24

Electrons: 21

GCSE configuration: [2,8,8,3]

A Level configuration: 1s2 2s2 2p6 3s2 3p6 4s2 3d1

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Titanium

Chemical symbol: Ti

Group: n/a

Period: 4

Atomic number: 22

Relative atomic mass (Ar): 47.9

Protons: 22

Neutrons: 26

Electrons: 22

GCSE configuration: [2,8,8,4]

A Level configuration: 1s2 2s2 2p6 3s2 3p6 4s2 3d2

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Vanadium

Chemical symbol: V

Group: n/a

Period: 4

Atomic number: 23

Relative atomic mass (Ar): 50.9

Protons: 23

Neutrons: 28

Electrons: 23

GCSE configuration: [2,8,8,5]

A Level configuration: 1s2 2s2 2p6 3s2 3p6 4s2 3d3

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Chromium

Chemical symbol: Cr

Group: n/a

Period: 4

Atomic number: 24

Relative atomic mass (Ar): 52.0

Protons: 24

Neutrons: 28

Electrons: 24

GCSE configuration: [2,8,8,6]

A Level configuration: n/a

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Manganese

Chemical symbol: Mn

Group: n/a

Period: 4

Atomic number: 25

Relative atomic mass (Ar): 54.9

Protons: 25

Neutrons: 30

Electrons: 25

GCSE configuration: [2,8,8,7]

A Level configuration: 1s2 2s2 2p6 3s2 3p6 4s2 3d5

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Iron

Chemical symbol: Fe

Group: n/a

Period: 4

Atomic number: 26

Relative atomic mass (Ar): 55.8

Protons: 26

Neutrons: 30

Electrons: 26

GCSE configuration: [2,8,8,8]

A Level configuration: 1s2 2s2 2p6 3s2 3p6 4s2 3d6

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Cobalt

Chemical symbol: Co

Group: n/a

Period: 4

Atomic number: 27

Relative atomic mass (Ar): 58.9

Protons: 27

Neutrons: 32

Electrons: 27

GCSE configuration: [2,8,8,9]

A Level configuration: 1s2 2s2 2p6 3s2 3p6 4s2 3d7

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Nickel

Chemical symbol: Ni

Group: n/a

Period: 4

Atomic number: 28

Relative atomic mass (Ar): 58.7

Protons: 28

Neutrons: 31

Electrons: 28

GCSE configuration: [2,8,8,10]

A Level configuration: 1s2 2s2 2p6 3s2 3p6 4s2 3d8

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Copper

Chemical symbol: Cu

Group: n/a

Period: 4

Atomic number: 29

Relative atomic mass (Ar): 63.5

Protons: 29

Neutrons: 35

Electrons: 29

GCSE configuration: [2,8,8,11]

A Level configuration: 1s2 2s2 2p6 3s2 3p6 4s2 3d9

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Zinc

Chemical symbol: Zn

Group: n/a

Period: 4

Atomic number: 30

Relative atomic mass (Ar): 65.4

Protons: 30

Neutrons: 35

Electrons: 30

GCSE configuration: [2,8,8,12]

A Level configuration: 1s2 2s2 2p6 3s2 3p6 4s2 3d10

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Gallium

Chemical symbol: Ga

Group: 3

Period: 4

Atomic number: 31

Relative atomic mass (Ar): 69.7

Protons: 31

Neutrons: 39

Electrons: 31

GCSE configuration: [2,8,8,13]

A Level configuration: 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p1

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Germanium

Chemical symbol: Ge

Group: 4

Period: 4

Atomic number: 32

Relative atomic mass (Ar): 72.6

Protons: 32

Neutrons: 41

Electrons: 32

GCSE configuration: [2,8,8,14]

A Level configuration: 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p2

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Arsenic

Chemical symbol: As

Group: 5

Period: 4

Atomic number: 33

Relative atomic mass (Ar): 74.9

Protons: 33

Neutrons: 42

Electrons: 33

GCSE configuration: [2,8,8,15]

A Level configuration: 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p3

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Selenium

Chemical symbol: Se

Group: 6

Period: 4

Atomic number: 34

Relative atomic mass (Ar): 79.0

Protons: 34

Neutrons: 45

Electrons: 34

GCSE configuration: [2,8,8,16]

A Level configuration: 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p4

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Bromine

Chemical symbol: Br

Group: 7

Period: 4

Atomic number: 35

Relative atomic mass (Ar): 79.9

Protons: 35

Neutrons: 45

Electrons: 35

GCSE configuration: [2,8,8,17]

A Level configuration: 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p5

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Krypton

Chemical symbol: Kr

Group: 0

Period: 4

Atomic number: 36

Relative atomic mass (Ar): 83.8

Protons: 36

Neutrons: 48

Electrons: 36

GCSE configuration: [2,8,8,18]

A Level configuration: 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6

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