Atomic structure and bonding - Jamb Chemistry Past Questions and Answers

Question 36:

• JAMB 1986

Which of the following groups of physical properties increases from left to right of the periodic table?
i. Ionization energy ii. Atomic radius iii. Electronegativity iv. Electron affinity

A. I and ii
B. I, ii and iii
C. Iii and iv
D. I, ii, iii and iv

Question 37:

• JAMB 1987

Inspite of the electronic configuration, 1s²2s²2p², carbon is tetraavalent because?

A. The electrons in both 2s and 2p orbitals have equal energy
B. The electrons in both 2s and 2p orbitals are equivalent
C. Both the 2s and 2p orbitals hybridizes
D. The six orbitals hybridize to four

Question 38:

• JAMB 1987

The greater the different in electronegativity between bonded atoms, the?

A. Lower the polarity of the bond
B. Higher the polarity of the bond
C. Weaker the bond
D. Higher the possibility of the substance formed being a molecule

Question 39:

• JAMB 1987

The atomic numbers of two elements X and Y are 12 and 19 respectively. The bond of these two elements is?

A. Ionic
B. Covalent
C. Neutral
D. Co-ordinate

Question 40:

• JAMB 1987

An isotope has an atomic number of 17 and a mass number of 36. Which of the following gives the correct number of neutrons and protons in an atom of the isotope?

A. Neutrons 53, Protons 17
B. Neutrons 17, Protons 36
C. Neutrons 19, Protons 17
D. Neutrons 36, Protons 17