Question

unit test 1c - periodic table and periodic trends adv
refer to the periodic table below to answer the following questions:
arrange the following elements (k, a, x, s) according to increasing atomic radius.
< < k <
arrange the following elements (z, s, a, m) according to decreasing ionization energy.

m > >

Explanation:

Step1: Recall atomic - radius trend

Atomic radius increases down a group and decreases across a period.

Step2: Analyze positions of K, A, X, S

A is above K in the same group, so A < K. S and X are in the same period and S is to the left of X, so S < X. Also, K is in a lower - period than S and X. So the order of increasing atomic radius is A < S < K < X.

Step3: Recall ionization - energy trend

Ionization energy decreases down a group and increases across a period.

Step4: Analyze positions of Z, S, A, M

Z is in a higher period than M, so Z has lower ionization energy than M. A is in a lower period than S and M. Among S and M, S is to the left of M in the same period, so S has lower ionization energy than M. The order of decreasing ionization energy is M > S > A > Z.

Answer:

1. A < S < K < X
2. M > S > A > Z