An element has elctronic configuration 2, 8, 2. What is its group number and valency?
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2
Answer:
IF AN ELEMENT HAS ELECTRONIC CONFIGURATION AS 2,8,2 THEN IT IS MAGNESIUM BECAUSE THE ATOMIC NUMBER OF MAGNESIUM IS 12
ITS GROUP NUMBER IS 2 AND PERIOD NUMBER IS 3
OHH SORRH I DIDNT SEEN THE VALENCY
SO, THE VALENCY IS 2 BCOZ THE ELECTRONIC CONFIGURATION IS 2,8,2 SO THE
ELECTRONS IN THE OUTERMOST SHELL IS 2 SO THE VALENCY IS 2....
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8
It belongs to II group and 3 period. The resemble element is Be. This element is Mg. Therefore, The atomic number of this element is 12
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