Question

science questions please​

Answer 1

Question :

The ion of an atom have 2 negative charge. Mass number of the atom is 16 and the number of neutrons are 8.What is the number of electrons in the ion ?

a] 6

b] 7

c] 8

d] 10

Given :

• Mass number of the atom = 16
• Number of neutrons = 8
• Charge of the ion = -2

To Find :

• Number of electrons in the ion

Solution :

Mass number is given by ,

★ Mass number = Number of protons + Number of neutrons

We have ,

• Mass number = 16
• Number of neutrons = 8

⇒ Number of protons + 8 = 16

⇒ Number of protons = 16 - 8

⇒ Number of protons = 8

$\bigstar$Number of protons = Number of electrons in neutral atom

⇒ Number of electrons inthe given atom (when it is neutral) = 8

We are given that the atom acquired -2 charge on it . This mean the atom has gained 2e⁻. So , Now the electrons in the given ion should be 10

∴ The Electrons in the given ion is 10

Hence , option(d) is correct.

Answer 2

Answer:

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Explanation: