GK
CHEMISTRY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Atomic number of magnesium [Mg] in the periodic table ____
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11
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13
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14
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12
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Explanation:
Detailed explanation-1: -Magnesium is a chemical element with symbol Mg and atomic number 12. Classified as an alkaline earth metal, Magnesium is a solid at room temperature.
Detailed explanation-2: -The atomic number of magnesium is 12 and of chlorine is 17.
Detailed explanation-3: -The atomic number of an atom is = The number of electrons present in it. Hence we can say that the number of protons in the nucleus of a magnesium atom are 12.
Detailed explanation-4: -We are all aware that an atom’s valency is determined by the number of its outermost electrons. It describes the atom’s propensity for combining. Magnesium, therefore, has a valency of two.
Detailed explanation-5: -The atomic number of magnesium is 12.
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