Q. 755.0( 2 Votes )
An element X of atomic number 12 combines with an element Y of atomic number 17 to form a compound XY2. State the nature of chemical bond in XY2 and show how the electron configurations of X and Y change in the formation of this compound.
Answer :
When an element X of atomic number 12 combines with an element Y of atomic number 17 to form a compound XY2. The nature of chemical bond in XY2 is ionic. The electronic configuration of X changes from 2, 8, 2 to 2, 8; The electronic configuration of Y change from 2, 8, 7 to 2, 8, 8.
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PREVIOUSFour elements A, B, C and D have the following electron arrangements in their atoms:
A 2, 8, 6
B 2, 8, 8
C 2, 8, 8, 1
D 2, 7
(a) What type of bond is formed when element C combines with element D?
(b) Which element is an inert gas?
(c) What will be the formula of the compound between A and C?NEXTThe electronic configurations of three elements A, B and C are as follows:
A 2, 8, 1
B 2, 8, 7
C 2, 4
(a) Which of these elements is a metal?
(b) Which of these elements are non-metals?
(c) Which two elements will combine to form an ionic bond?
(d) Which two elements will combine to form a covalent bond?
(e) Which element will form an anion of valency 1?
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