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.
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.
Related Questions
Define an 'isotope'. Give reasons why isotopes have same chemical but different physical properties.
Explain the reason for chemical activity of an atom with reference to it's electronic configuration.
Draw the geometric atomic structure of the three isotopes of hydrogen and the two isotopes of chlorine.
What are noble gases. Give a reason why noble gases have stable electronic configuration.