The position of three elements A, B and C in the Periodic Table are shown below - Science

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The position of three elements A, B and C in the Periodic Table are shown below –

Group 16
Group 17
A
B
C

(a) State whether A is a metal or non-metal.
(b) State whether C is more reactive or less reactive than A.
(c) Will C be larger or smaller in size than B?
(d) Which type of ion, cation or anion, will be formed by element A?

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Solution

(a) A is a non-metal.

(b) C is less reactive than A, as reactivity decreases down the group in halogens.

(c) C will be smaller in size than B as moving across a period, the nuclear charge increases and therefore, electrons come closer to the nucleus.
 
(d) A will form an anion as it accepts an electron to complete its octet.
  Is there an error in this question or solution?
Chapter 5: Periodic Classification of Elements - Exercises [Page 92]

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NCERT Science Class 10
Chapter 5 Periodic Classification of Elements
Exercises | Q 6 | Page 92

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