Question

how many information can be obtained from the electronic configuration of the outermost orbit ? mention at least, three information regarding the elements

Answer 1

*it shows the valency
*it show how reactive a metal is
*it show how many electrons are present out of 8
(optional)
*it show the whether metal or non metal a substance is.

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Answer 2

It tells you how many electrons there are in each of the different orbitals (s, p, d, or f) and at which energy level (n= 1, 2, 3, ...).
Examples:
1s2→ 2 electrons in the s orbital on first energy level. (this happens to be the electron configuration of helium, He)
[He]2s22p5→ electron configuration of fluorine, F. Here's how you'd break down the configuration

1s2, so 2 electrons in the s orbital on 1st energy level - this is the electron configuration of helium;

2s2, so 2 electrons in s orbital on 2nd energy level;

2p5, so 5 electrons in the p orbital on 2nd energy level

[Ar]4s23d2 -> electron configuration of titanium, Ti

[Ar] - the electron configuration of argon, Ar

2 electrons in s orbital of 4th energy level

2 electrons in d orbital on 3rd energy level

Hope it help.

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Thanq.