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Tennessine (Ts)

Element 117 · halogen · group 17, period 7

Tennessine shell diagram: 2, 8, 18, 32, 32, 18, 7 electronsTs117
Electron shells, 2 + 8 + 18 + 32 + 32 + 18 + 7. The outer shell is highlighted - it is the only one that takes part in bonding.

Tennessine is element 117, a halogen in group 17 and period 7. Its electron configuration is [Rn] 5f14 6d10 7s2 7p5. That leaves 7 valence electrons in the outer shell, with the shells filling 2, 8, 18, 32, 32, 18, 7. It is 1 electron short of a full octet, so it gains them and carries a charge of -1.

Properties

Atomic number117
SymbolTs
Standard atomic weight294 u
Group17
Period7
Blockp-block
Categoryhalogen
Electron configuration1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d10 4f14 5s2 5p6 5d10 5f14 6s2 6p6 6d10 7s2 7p5
Noble-gas notation[Rn] 5f14 6d10 7s2 7p5
Electrons per shell2, 8, 18, 32, 32, 18, 7
Valence electrons7
Common ionic charge-1
Electronegativity (Pauling)no accepted value
Protons / electrons117 / 117

Electron configuration of tennessine

Orbitals fill from the lowest energy upward. Writing that out for tennessine gives 1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d10 4f14 5s2 5p6 5d10 5f14 6s2 6p6 6d10 7s2 7p5, which is 1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d10 4f14 5s2 5p6 5d10 5f14 6s2 6p6 6d10 7s2 7p5 in plain text.

Everything up to Rn is the same as in that noble gas, so it is usually abbreviated to [Rn] 5f14 6d10 7s2 7p5. The part outside the bracket is what does the chemistry.

SubshellElectronsCapacity
1s 2 2
2s 2 2
2p 6 6
3s 2 2
3p 6 6
3d 10 10
4s 2 2
4p 6 6
4d 10 10
4f 14 14
5s 2 2
5p 6 6
5d 10 10
5f 14 14
6s 2 2
6p 6 6
6d 10 10
7s 2 2
7p 5 6

Tennessine ion charge

Tennessine commonly forms ions with a charge of -1.

It has 7 valence electrons, so it is 1 short of a full octet and 7 above an empty outer shell. An atom takes whichever route is shorter, which is why the charge comes out as it does.

Common questions

How many valence electrons does tennessine have?

Tennessine has 7 valence electrons. For a main-group element the count is the group number minus 10, and tennessine is in group 17.

What is the electron configuration of tennessine?

1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d10 4f14 5s2 5p6 5d10 5f14 6s2 6p6 6d10 7s2 7p5, or [Rn] 5f14 6d10 7s2 7p5 written from the previous noble gas. Orbitals fill lowest energy first.

What is the charge of tennessine?

Tennessine commonly forms ions with a charge of -1. With 7 valence electrons it is 1 short of an octet and 7 above an empty shell, so it takes whichever route is shorter.

How many protons, electrons and neutrons does tennessine have?

A neutral tennessine atom has 117 protons and 117 electrons. Its standard atomic weight is 294, so the most common isotope has about 177 neutrons.

See the ionic charge of every element →

How this page was produced. The configuration was built by filling orbitals in energy order from atomic number 117 alone, not looked up. The shell counts, the valence count and the charge all follow from it. Nothing on this page is written per element.