Study the information given below and answer the questions that follow. Element Atomic radius(nm) Ionic radius nm
Question:
- 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 |
- 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)