Question

Read the given passage and answer the questions that follow:

Elements are arranged in Modern Periodic table in increasing order of their atomic numbers. Metals are on left hand side and middle of periodic table mainly and non-metals are on right hand side. A zig-zag diagonal line divides metals and non-metals. Elements near zig-zag line are called metalloids. Elements of same group have same number of valence electrons but different number of shells. Elements of same period have different number of valence electrons but same number of shells. Elements in the middle of periodic table are called transition metals.

(a) Which one of the following statement is correct?
(i) All groups contain both metal and non-metals.
(ii) In group 17, reactivity decreases down the group.
(iii) In group 1, reactivity decreases down the group.
(iv) Atoms of same group have same number of electrons.

(b) Which of the following is correct formula of hydrides of phosphorus?
(i)PH2
(ii) PH4
(iii)PH5
(iv)PH3

(c) What is the valency of group 13 elements?
i) 13
ii) 3
iii) 5
iv) 8

(d) Valence electrons _____ across the period.
i) Decreases
ii) Increases
iii) First increases and decreases
iv) None of the above.​

Answer 1

Answer:

a ii

b iv PH3

c ii 3

d iii First increases and decreases.

Answer 2

Answer:

kindly see the answer attached above.

Explanation:

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