SCIENCE
PHYSICAL SCIENCES
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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What is the valence electron of Francium?
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1
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2
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3
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4
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Explanation:
Detailed explanation-1: -Francium has only 1 valence electron.
Detailed explanation-2: -Francium atoms have 87 electrons and the shell structure is 2.8. 18.32. 18.8. 1.
Detailed explanation-3: -Fluorine – Atomic number of fluorine is 9. Its electronic configuration is 2, 7. It needs one electron to fulfil its octet and attain stability. So, its valency is 1.
Detailed explanation-4: -How do you find the valence electrons? For neutral atoms, the number of valence electrons is equal to the atom’s main group number. The main group number for an element can be found from its column on the periodic table. For example, carbon is in group 4 and has 4 valence electrons.
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