Question

What is the mass number of an ion with 104 electrons, 158 neutrons, and a +1 charge?

Answer 1

Answer: 263

Explanation:

Mass number is the sum of total number of protons and neutrons. In any neutral atom, number of protons = number of electrons

Since the ion has a positive charge +1, it means that it has one less electron than the number of protons.

Why? Because electrons are negatively charged and protons are positively charged. This implies:

Number of electrons > Number of protons => negative charge

Number of electrons < Number of protons => positive charge

(Important: Neutrons have no charge.)

So, number of protons in the ion = 104 + 1 = 105

Therefore, mass number = 158 + 105 = 263

Answer 2

The mass number of an ion with 104 electrons, 158 neutrons, and a +1 charge is 263.

How to calculate mass number?

The mass number of an element can be calculated by summing the number of protons and the number of neutrons in the nucleus of the atom.

The proton number is the same as the atomic number of the element.

According to this question, an ion has 104 electrons, 158 neutrons, and a +1 charge. This means that the ion has 105 protons.

Hence, the mass number of the ion will be 105 + 158 = 263.

Therefore, the mass number of an ion with 104 electrons, 158 neutrons, and a +1 charge is 263.

Learn more about mass number at: brainly.com/question/4408975

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