Chemistry
Four elements A, B, C, D are given :
A shows the presence of 20 neutrons, 17 protons and 17 electrons.
B shows the presence of 18 neutrons, 17 protons and 17 electrons.
C shows the presence of 10 neutrons, 9 protons and 10 electrons.
D shows the presence of 4 neutrons, 3 protons and 2 electrons.
State which of the above is —
(a) an anion
(b) a cation
(c) a pair of isotopes.
Write the formula of the compound formed between D and C.
Atomic Structure
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Answer
(a) C is an anion.
Reason — C has 10 electrons but 9 protons. It means that C accepted 1 electron to achieve a stable electronic configuration. Hence, it is an anion.
(b) D is a Cation.
Reason — D has 2 electrons but 3 protons. It means that D donated one of its electrons to achieve a stable electronic configuration. Hence, it is a cation.
(c) A and B form a pair of isotopes.
Reason — Both A and B have the same number of protons and electrons i.e., 17 but differ in the number of neutrons. Hence, they form a pair of isotopes.
Formula of the compound formed between D and C:
D donates one electron and C accepts one electron. Hence, formula of compound formed between D and C is DC.
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