Arrange each set in order of increasing atomic size:

(a) Rb, K, Cs (b) C, O, Be (c) Cl, K, S (d) Mg, K, Ca

Question

Caden Cherry

Chemistry

11 August, 19:39

Arrange each set in order of increasing atomic size:

(a) Rb, K, Cs (b) C, O, Be (c) Cl, K, S (d) Mg, K, Ca

+5

Answers (1)

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Deanna Cain · Answer 1

Part A:

Order: K
Part B:

Order: O
Part C:

Order:CL
Part D:

Order:Mg
Explanation:

Atomic Size:

It is the distance from the center to atom to the valance shell electron. It is very difficult to measure the atomic size because there is definite boundary of atom.

Trend:

Moving from top to bottom in a group, Atomic Size increases.

Moving from left to right in a period, Atomic size generally decreases.

On the basis of above trend we will solve our question:

Part A:

All elements belong to Group 1:

Moving from top to bottom in a group, Atomic Size increases.

Order: K
Part B:

All elements belong to 2nd Period:

Moving from left to right in a period, Atomic size generally decreases.

Order: O
Part C:

S belongs to 3rd Period, K, Cl belong to 4th period

Order:CL
Part D:

Mg is above Ca in group 2 and K is before Ca in 4th period

From trends described above:

Order:Mg

Arrange each set in order of increasing atomic size:(a) Rb, K, Cs (b) C, O, Be (c) Cl, K, S (d) Mg, K, Ca

Arrange each set in order of increasing atomic size:

(a) Rb, K, Cs (b) C, O, Be (c) Cl, K, S (d) Mg, K, Ca