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3 years ago

The isotope sodium-20 has how many protons?

Chemistry

2 answers:

kati45 [8]3 years ago

6 0

Answer:

Option A. 9

Explanation:

Isotope results when there is a change in the Neutron number of an atom.

From the question,

Mass number of the sodium isotope = 20

But the atomic number of isotopes are constant. Therefore, the isotope has:

Proton = 11

Mass number = Neutron + Proton

Neutron = Mass number — Proton

Neutron = 20 — 11 = 9

Anna007 [38]3 years ago

4 0

Answer:11

Explanation:

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