example #1: atomic radii\n1. which of the following elements will have the smallest atomic size?\na) c\nb)…

example #1: atomic radii\n1. which of the following elements will have the smallest atomic size?\na) c\nb) n\nc) o\nd) f\n2. which of the following elements in group 2 will have the largest atomic size?\na) be\nb) mg\nc) sr\nd) ba\n3. which of the following elements will have the largest atomic size?\na) al\nb) cl\nc) br\nd) mg

example #1: atomic radii\n1. which of the following elements will have the smallest atomic size?\na) c\nb) n\nc) o\nd) f\n2. which of the following elements in group 2 will have the largest atomic size?\na) be\nb) mg\nc) sr\nd) ba\n3. which of the following elements will have the largest atomic size?\na) al\nb) cl\nc) br\nd) mg

Answer

Explanation:

Step1: Recall atomic - size trends

Atomic size decreases across a period (left - to - right) due to increasing effective nuclear charge.

Step2: Analyze elements in question 1

C, N, O, and F are in the same period. F is the right - most element among them. So, F has the smallest atomic size.

Step3: Recall group - size trend

Atomic size increases down a group due to the addition of electron shells.

Step4: Analyze elements in question 2

Be, Mg, Sr, and Ba are in Group 2. Ba is the bottom - most element, so it has the largest atomic size.

Step5: Analyze elements in question 3

Among Al, Cl, Br, and Mg, Br has more electron shells compared to Al, Cl, and Mg. So, Br has the largest atomic size.

Answer:

  1. d) F
  2. d) Ba
  3. c) Br