Question

Select from the table
(i) Which is most electronegative
(ii) How many valence electrons are present in G
(iii) Write the formula of the compound between B and H
(iv) In the compound F and J what type of bond will be formed
(v) Draw the electron dot structure for the compound formed between C and K

IA	IIA	IIIA	IVA	VA	VIA	VIIA	VIIIA
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 1

Periodic table is the arrangement of elements in order of their increasing atomic number. It was given by the scientist named Mendeleev and this table consists of 7 groups and 18 periods rather than this it also contains two lines of elements below the table known by the name lanthanide and actinide.

Complete step by step answer:
(i) Which is most electronegative: Atoms of group 17 are most electronegative in nature as by gaining an electron they can achieve their noble gas configuration so J is the answer.
(ii) How many valence electrons are present in G: Valence electrons are those electrons which present in the outermost shell of electrons in the 15th period; the number of valence electrons remain 5 so the answer is 5.
(iii) Write the formula of the compound between B and H: The formula of the compound between B and H depends on their valency. Valence electrons present in B is 1 and in H it is 6 and the valency of B +1 and H is -2 therefore compound formed between B and H is ${{B}_{2}}H$.
(iv) In the compound F and J what type of bond will be formed: In this case the bond formed is covalent in nature.
(v) Draw the electron dot structure for the compound formed between C and K: The structure can be represented as:
: K̤̈: ${{C}^{2+}}$ : K̤̈:
Note: Electronegativity term refers to the tendency of an atom in a molecule which attracts a shared pair of electrons towards itself. It is a dimensionless property. The combining capacity of an atom is known by its valency.