Cr+3 has the same electron configuration as which neutral atom?

Scandium (Sc)

Explanation:

Cr³⁺ is a chromium atom that has lost 3 electrons. A chemical specie becomes positively charged when the number of electrons is lower than the number of protons.

 In this regard, the number of protons is more.

Chromium originally has 24 electrons, on losing 3 electrons it will now have 21 electrons.

The atom with 21 electrons in its neutral state is scandium

answer: -

reaction:

na + cl ⇌ nacl

balanced chemical equation:

na + 2cl ⇌ nacl2

sodium + clorine goes to form sodium chloride (table salt).

the product is nacl2.

and the reactants are na and cl.

(note: if you don’t know what ⇌ means, read below: -

⇌(double head arrow) means reversible reaction).