SCIENCE
PHYSICAL SCIENCES
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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How many valence electrons do Group 2 elements have?
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1
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2
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7
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8
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Explanation:
Detailed explanation-1: -All the elements in Group 2 have two electrons in their valence shells, giving them an oxidation state of +2.
Detailed explanation-2: -Group 2 has 2 valence electrons.
Detailed explanation-3: -Thus, the element in the second group of the periodic table will have an outermost s orbital filled with two electrons of different spins. Hence, the number of valence electrons in group 2 is two.
Detailed explanation-4: -A: Calcium is a group 2 element with two valence electrons.
Detailed explanation-5: -The atomic number of Helium is Z = 2. The electronic configuration is, 2. Therefore, Helium is a noble gas with two valence electrons.
There is 1 question to complete.