How many electrons will an element have if it has an atomic number of 20, an atomic mass of 40 and a charge of +2? * A.)40 B.)18 C.)22 D.)20

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asked Dec 12, 2021 4.6k views

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Scytale · Answer 1 · 2021-12-17T05:52:15+0000

answer: B)18
This is because the atomic number is the amount of protons. The number of protons equal the number of electrons in a neutral atom. But since it has a charge of +2, you subtract 2 from 20. +2 is a anion.

How many electrons will an element have if it has an atomic number of 20, an atomic mass of 40 and a charge of +2? * A.)40 B.)18 C.)22 D.)20

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