Periodic classification questions | form two Chemistry

Elements K, L, M and N have atomic numbers 6, 8, 9 and 20 respectively. Classify each element into its respective period and group.

Answer / Solution

UNSOLVED

Give one example in each of the following:
(i) Alkali earth metals.
(ii) Noble gases.
(iii) Transition elements.

Answer / Solution

UNSOLVED

Which of the following sets of elements is arranged in order of increasing electronegativity?

1. Chlorine, fluorine, nitrogen, oxygen, carbon
2. Fluorine, chlorine, oxygen, nitrogen, carbon
3. Carbon, nitrogen, oxygen, chlorine, fluorine
4. Nitrogen, oxygen, carbon, fluorine, chlorine
5. Fluorine, nitrogen, oxygen, chlorine, carbon

Answer / Solution

100. Carbon, nitrogen, oxygen, chlorine, fluorine

Which of the following is the electronic configuration of an element Y found in period 3 and group II of the periodic table?

1. 2:8
2. 2:8:2
3. 2:6
4. 2:8:8:2
5. 2:8:4

Answer / Solution

2. 2:8:2