Question

an element is represented by 12mg24 calculate the number of electrons protons and neutrons nucleons and valence electrons what it is valency.
class 9
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Answer 1

Explanation:

The atomic number (Z) of magnesium atom = 12

For neutral atom, Number of protons (p) = Number of electrons (e) = atomic number (Z)

i.e Number of protons in the nucleus of Magnesium atom = 12

Now, for Mg +2

number of electrons = 12 -2 = 10

and the number of protons remains the same i.e 12

Thus, the correct answer is 10, 12

Answer 2

Answer:

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