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Which ion has a charge of 2+?
A
an ion with 10 protons, 9 neutrons, and 8 electrons

B
an ion with 8 protons, 10 neutrons, and 8 electrons

C
an ion with 8 protons, 9 neutrons, and 10 electrons

D
an ion with 10 protons, 10 neutrons, and 10 electrons

Respuesta :

Answer:

an ion with 10 protons, 9 neutrons, and 8 electrons

Explanation:

A neutral atom has equal number of protons and electrons.

During any process, the atom can lose or gain electrons.

If an atom loses electrons it acquire positive charge and is an atom gains electrons it acquire negative charge.

If an atom loses two electrons or has two electrons lesser than the number of protons then it means it has +2 charge.

Hence an ion with 10 protons, 9 neutrons, and 8 electrons

ardni313

Ion has a charge of 2⁺ : an ion with 10 protons, 9 neutrons, and 8 electrons

Further explanation

Ions are atoms that have a charge

Ions are formed because of capturing or releasing electrons.

Ions can be differentiated based on the number of constituent elements they become

  • 1. monatomic ion, if it comes from one element, such as K⁺, Mg²⁺, Cl⁻
  • 2. polyatomic ions, if it comes from two or more elements such as PO₄³⁻, SO₄²⁻, ClO₃⁻

Based on the charge, ions can be divided into:

  • 1. positive ion (cation)

happens if the atom releases electrons, for example

Al³⁺, ---> Al⇒ Al³⁺ + 3e⁻

Pb²⁺, ----> Pb⇒ Pb²⁺ + 2e-

  • 2. negative ions (anions)

happens if the atom captures electrons, like

S²⁻, S + 2e⁻⇒ S²⁻

F⁻, F + e⁻⇒ F⁻

In the following element notation,

[tex] \large {{{A} \atop {Z}} \right X} [/tex]

X = symbol of elemental atom

A = mass number

   = number of protons + number of neutrons

Z = atomic number

   = number of protons = number of electrons, on neutral elements

For charged elements:

number of electrons = atomic number - number of charges

Ions that have a 2⁺ charge are cations

This ion releases 2 electrons

because atomic number = number of protons then:

number of electrons = number of protons - number of charges

number of charges = number of protons - number of electrons

+2 = number of protons - number of electrons

From the available answer choices, the number of protons - number of electrons = +2 is choice A

The number of neutrons has no effect on the charge of an element because neutrons have a neutral charge

Learn more

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