Using the periodic table, classify each of the following elements as a metal or a nonmetal, and then further classify each as a main-group (representative) element, transition metal, or inner transition metal:

(a) cobalt

(b) europium

(c) iodine

(d) indium

(e) lithium

(f) oxygen

(h) cadmium

(i) terbium

(j) rhenium

a. Cobalt: - Using the periodic table, we have an atomic number of cobalt is \(27\) and present in \({9^{th}}\) group and \({4^{th}}\) period. So, it is metal and transition metal.

b. Europium: - Using the periodic table, we have an atomic number of cobalt is \(63\) and present in \({9^{th}}\) group and \({6^{th}}\) period. So, it is metal and transition metal.

c. Iodine: Using the periodic table, we have an atomic number of cobalt is \(53\) and present in \({17^{th}}\) group and \({5^{th}}\) period. So, it is non-metal and main group element.

d. Indium: - Using the periodic table, we have an atomic number of cobalt is \(49\) and present in \({13^{th}}\) group and \({5^{th}}\) period. So, it is metal and main group element.

e. Lithium: - Using the periodic table, we have an atomic number of cobalt is \(3\) and present in \({1^{st}}\) group and \({2^{nd}}\) period. So, it is metal and main group element.

f. Oxygen: Using the periodic table, we have an atomic number of cobalt is \(8\) and present in \({16^{th}}\) group and \({2^{nd}}\) period. So, it is non-metal and main group element.

h. Cadmium: - Using the periodic table, we have an atomic number of cobalt is \(48\) and present in \({12^{th}}\) group and \({5^{th}}\) period. So, it is metal and transition metal.

i. Terbium: - Using the periodic table, we have an atomic number of cobalt is \(65\) and present in \({11^{th}}\) group and \({6^{th}}\) period. So, it is metal and Inner transition metal.

j. Rhenium: Using the periodic table, we have an atomic number of cobalt is \(75\) and present in \({7^{th}}\) group and \({6^{th}}\) period. So, it is metal and transition metal.