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Which has the largest number of valence electrons? Se P F S

Which has the largest number of valence electrons?
Se
P
F
S

Science   Chemistry   
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Answer #1

Valence electrons

Valence electrons are electrons of an atom, located in the outermost shell (valence shell)of the atom, that can be transferred to or shared with another atom.

Se( Selenium)

The atomic number of selenium ( Se) is 34

The electronic configuration of Se is 2, 8, 18,6

Therefore the number of valence electrons = 6

P ( phosphorous)

The atomic number of phosphorous is 15

The electronic configuration is 2,8,5

Therefore the number of valence electrons is 5

F (Fluorine)

The atomic number of fluorine = 9

The electronic configuration is 2, 7

The number of valence electrons is 7

S (Sulphur)

The atomic number of sulphur = 16

The electronic configuration is 2, 8,6

There fore the number of valence electrons = 6

The largest number of valence electrons are for Fluorine which is 7

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