Please answer 18 (iii) and (iv) Please do not provide any link â ‹Q18 - Chemistry - Periodic Properties and Variations of Properties - Physical and Chemical

Question

Please answer 18 (iii) and (iv)
Please do not provide any link

â€‹Q18 Explain why are the following statements
not correct:

(iii) Non- metallic character decreases across a period with
increase in atomic number

(iv) Reactivity increases with atomic number in a group as well as
in a period

Vartika Jain · Accepted Answer

Dear Student,

18
(iii) Non-metallic character increases across a period with increase in atomic number
 As we move from left to right across a period, size of atom decreases as effective nuclear charge increases and thus tendency to donate electrons decreases
 Therefore, metallic character decreases
 As effective nuclear charge is increasing, so tendency to accept electrons i
e  non-metallic character is increased
(iv) For a metal, reactivity is the tendency to lose electrons
 As we move down the group, size of atom increases and thus they can lose electrons easily
 Whereas, in case of non-metals reactivity is the tendency to accept electron
 Therefore, on going down the group, reactivity of non metals decreases
Also, for  metals, reactivity decreases on going from left to right size of atom decreases
 But for non metals, reactivity increases on going from left to right as size of atom decreases

Please answer 18 (iii) and (iv). Please do not provide any link. ​Q18. Explain why are the following statements not correct: (iii) Non- metallic character decreases across a period with increase in atomic number. (iv) Reactivity increases with atomic number in a group as well as in a period.

Please answer 18 (iii) and (iv).
Please do not provide any link.

Q18. Explain why are the following statements not correct:

(iii) Non- metallic character decreases across a period with increase in atomic number.

(iv) Reactivity increases with atomic number in a group as well as in a period.