Question

Write the charge and full ground-state electron configuration of the monatomic ion most likely to be formed by each:(a) P (b) Mg (c) Se​

Answer 1

Answer:

The electron configuration of atoms or ions depends on the number of electrons present.

The electron configuration refers to the arrangement of electrons in an atom or ions. Electrons are arranged in energy levels and each energy level is composed of orbitals.

The monoatomic ion most likely formed by P is P^3-. The electron configuration of this ion is 1s2 2s2 2p6 3s2 3p6. This is because P is in group 15 and attains a stable octet by gaining three electrons.

The monoatomic ion most likely formed by Mg is Mg^2+. Mg is a group 2 element and attains a stable octet by loss of two electrons. The electron configuration of this ion is 1s² 2s² 2p^6.

Se is a group 16 element, the monoatomic ion formed by Se is Se^2-. Se attains a stable octet by gain of two electrons. The electron configuration of this ion is; 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6.

or you can also write like
Part A:

Charge is

Configuration is

Part B:

Charge is

Configuration is

Part C:

Charge is

Configuration is

Explanation:

Monatomic ions:

These ions consist of only one atom. If they have more than one atom then they are poly atomic ions.

Examples of Mono Atomic ions:

Part A:

For P:

Phosphorous (P) has 15 electrons so it require 3 more electrons to stabilize itself.

Charge is

Full ground-state electron configuration of the mono atomic ion:

Part B:

For Mg:

Magnesium (Mg) has 12 electrons so it requires 2 electrons to lose to achieve stable configuration.

Charge is

Full ground-state electron configuration of the mono atomic ion:

Part C:

For Se:

Selenium (Se) has 34 electrons and requires two electrons to be stable.

Charge is

Full ground-state electron configuration of the mono atomic ion:

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Answer 2

Answer:

if the charge is -3 it is -p ..it is likely to be formed by p