Question

Predict the formula of a binary compound formed by- a) Aluminium and Chlorine.
b) Magnesium and Sulphur.

Answer 1

Answer:

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Answer 2

Answer:

(i) Alkali metal lithium (with 1 valence electron) combine with group 16 element oxygen (having valence of 2) to form Li

2

O.

(ii) Alkaline earth metal magnesium (with 2 valence electrons) combines with group 5 element nitrogen (having valence 3) to form Mg

3

N

2

.

(iii) Group 13 element aluminum (with 3 valence electrons) combines with group 17 element iodine (a halogen with valence 1) to form AlI

3

.

(iv) Group 14 element silicon (with a valence of 4) combines with group 16 element oxygen ( having valence 2) to form SiO

2

.

(v) Group 15 element phosphorous (with valence 3 or 5) combines with group 17 element fluorine (a halogen with valence 1) to form PF

3

or PF

5

.

(vi) Element 71 with 3 electrons in the valence shell (4f

14

5d

1

6s

2

) combines with group 17 element fluorine (a halogen with valence 1) to form EF

3

where E is the symbol of the element.

Explanation:

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