## Which element has the electron configuration of 1s22s22p63s23p1?

Now, among the given options Al is the correct option as, the atomic number of aluminum Is 13 and further, according the given rules, its electronic configuration is \$1{s^2}2{s^2}2{p^6}3{s^2}3{p^1}\$. Hence, option B is correct.

What is the electron configuration for Fe3+?

[Ar] 3d6 4s2
Iron/Electron configuration

### What is the electron configuration of Fe 2+?

Re: electron configuration for Fe2+ So the electron configuration for Fe is [Ar] 3d^6 4s^2. Fe^2+ means that 2 electrons are taken away. You start removing e- from the outermost shell. The outermost shell, in this case, is the 4s orbital.

What element has this electron configuration Ar 4s2?

The element with an electronic configuration of (Ar)4s23d104p3 ( A r ) 4 s 2 3 d 10 4 p 3 is Arsenic. This is because Ar represents 18 atoms, 2 atoms are in 4s2 4 s 2 , a0 atoms in 3d10, and 3 atoms in 4p^3.

#### What element is 4s2?

Electron Configuration Match 1–Complete Address

A B
calcium 1s2 2s2 2p6 3s2 3p6 4s2
chromium 1s2 2s2 2p6 3s2 3p6 4s1 3d5 !
copper 1s2 2s2 2p6 3s2 3p6 4s1 3d 10 !
bromine 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p5

Is Fe3+ to Fe2+ oxidation or reduction?

It is actually a reduction, because the oxidation state of the iron ion decreases. We see it explicitly in the following half-reaction: Fe3++eâˆ’â†’Fe2+ F e 3 + + e âˆ’ â†’ F e 2 + .

## Why is Fe2+ bigger than Fe3+?

Fe2+ is greater in size as it has lost less electrons than Fe3+ . So, the nuclear pull is more strong on Fe3+ decreasing the atomic size. Thus Fe2+ is greater in size.

What element is 1s2 2s2 2p6 3s2 3p6 4s2 3d9?

### What element is 3s2?

Electron Configuration Match 2 — Core Configurations

A B
neon [He] 2s2 2p6
magnesium [Ne] 3s2
aluminum [Ne] 3s2 3p1
silicon [Ne] 3s2 3p2

What element is AR 4s2 3d10 4p4?

What element has the electron configuration AR 4s2 3d10 4p4? That is, however, a noble gas shorthand for the electron configuration of selenium.