Question

In the table below, H does not represent hydrogen. Some elements are given in their own symbol and position in the periodic table while others are shown with a letter.

IA	IIA	IIIA	IVA	VA	VIA	VIIA	O
1	2	13	14	15	16	17	18
Li		D			O	J	Ne
A	Mg	E	Si		H	K
B	C		F	G			L

Answer the following questions.

1. Identify the most electronegative element.
2. Identify the most reactive element of group IA or 1.
3. Identify the element from period 3 with the smallest atomic size
4. Identify the element with the highest ionization potential.
5. How many valence electrons are present in O?
6. Which element from group 2 will have the least ionization energy?
7. Identify the noble gas of the fourth period.
8. In the compound between A and H, what type of bond is formed? Give its molecular formula.

Answer 1

1. J is the most electronegative element.
2. R is the most reactive element of group 1.
3. M is the element from period 3 with least atomic size.
4. The 5 valence electrons are present in Q.
5. T is the element from group 2 which has least ionization energy.
6. y is the noble gas of the fourth period.
7. An ionic bond is formed between A and H with the molecular formula A₂H.