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31.12.2020 •
Chemistry
What is kinetic energy?
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Ответ:
Ответ:
Option (b) is the correct answer.
Explanation:
It is known that for every neutral atom the number of protons equals the number of electrons.
There are 11 protons and 11 electrons are given that is the atom is neutral. Therefore, we can conclude that atomic number of atom is 11 that is, it is a sodium atom.
Hence, 11 + 12 = 23 which is the atomic mass of sodium.
Thus, the element is sodium.