1. Study the information given below and answer the questions that follow.

Element	Atomic radius(nm)	Ionic radius nm	Formula of oxide	Melting point(0c)
A	0.364	0.421	A2 O	-119
D	0.830	0.711	D O2	837
E	0.592	0.485	E2 O3	1466
G	0.381	0.446	G 2O3	242
J	0.762	0.676	J O	1054

1. a.Which elements are non- metals?

Give a reason? (2mks)

b.I)Write a formula of a compound formed when J combines with A(1mk)
ii)What type of bond exist between J and D.(1mk)

c.Explain why the melting point of the oxide of E is higher than that of the oxide of G.(2mks)
d.i)Which two elements would react with each other most vigorously. Give a
reason. (2mks)

ii)Which element would be suitable for making utensils for boiling water. State two properties that make the elements suitable for the use. (2mks)

e. Elements Q and R have electronic configuration 2.8.2 and 2.8.6. respectfully.

i). Explain why the ionic radius of R is expected to be greater than its atomic
radius. (1mk)

ii)Write the equation for the reaction between Q and R.(1mk)

Answer rating: 100% (QA)

The detailed answer for the above question is provided below aWhich elements are non metals Give a reason 2mks ANSWER A and E are nonmetals because th... View the full answer