Atomic structure and bonding - Jamb Chemistry Past Questions and Answers

Question 26:

• JAMB 1981

The electronic configuration of elements X and Y are X = 2, 8, 6; Y = 2, 8, 7. The bond in the compound formed by X and Y is expected to be?

A. Ionic
B. Covalent
C. Dative covalent
D. Metallic
E. None of the above

Question 27:

• JAMB 1982

If atom X with six electrons in its outermost shell combines with atom Y with one electron in its outermost shell to form an ionic compound, then?

A. Six atoms of X will combine with one of Y
B. Two atoms of X will combine with six of Y
C. One atom of X will combine with two of Y
D. Two atoms of X will combine with one of Y
E. One atom of X will combine with six of Y

Question 28:

• JAMB 1982

Which of the following bonds exist in crystalline ammonium chloride (NH₄Cl)?

A. Ionic and covalent
B. Ionic and co-ordinate
C. Ionic covalent and co-ordinate
D. Covalent , co-ordinate and metalllic
E. Ionic, covalent and metallic

Question 29:

• JAMB 1983

If an element has the electronic configuration 1s ² 2s² 2p³ 3s² 3p⁴, it is

A. A metal
B. An alkaline earth metal
C. An s-block element
D. A p-Block element
E. A transition element

Question 30:

• JAMB 1983

An element is electronegative if

A. It has a tendency to exist in the gaseous from
B. Its ions dissolve readily in water
C. It has a tendency to lose electrons
D. It has a tendency to gain electrons
E. It readily froms covalent bonds