The element be,mg,ca are placed in the seconf group of perpdic table their atomic no are 4,12,20 respectively (a)write the electronic configuration of these elements (b) write the valency exhibted them (c) which of the three elements will bevmost reactive
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(a) Since the three elements are in group 2 so there outermost shell has 2 electrons
Electronic Configuration :
Be ----> 2,2
Mg ----> 2,8,2
Ca -----> 2,8,8,2
(b) The valency exhibited by them is (+) 2.
(c) The most reactive element among them is Ca (Calcium) It is because reactivity of metals keeps on increasing as we move down a group.
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HOPE IT HELPS ^_^
___________________________
(a) Since the three elements are in group 2 so there outermost shell has 2 electrons
Electronic Configuration :
Be ----> 2,2
Mg ----> 2,8,2
Ca -----> 2,8,8,2
(b) The valency exhibited by them is (+) 2.
(c) The most reactive element among them is Ca (Calcium) It is because reactivity of metals keeps on increasing as we move down a group.
___________________________
HOPE IT HELPS ^_^
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a) electronic configuration-
be- 2.2
mg- 2.8.2
ca - 2.8.8.2
b) The valency of each of them is 2.
c) calcium is most reactive as it is placed below magnesium and beryllium in group 2 of modern periodic table (reactivity of elements increase down a group)
be- 2.2
mg- 2.8.2
ca - 2.8.8.2
b) The valency of each of them is 2.
c) calcium is most reactive as it is placed below magnesium and beryllium in group 2 of modern periodic table (reactivity of elements increase down a group)
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