JAMB and WAEC Chemistry questions

800 questions with answers and explanations. Tap an option to check yourself.

All topics Acids, bases and salts · 58 Air · 37 Atomic structure and bonding · 59 Chemical combination · 58 Chemical equilibrium · 37 Chemistry and industry · 35 Electrolysis · 41 Energy changes · 38 Environmental pollution · 32 Kinetic theory of matter and gas laws · 45 Metals and their compounds · 47 Non-metals and their compounds · 45 Organic compounds · 72 Oxidation and reduction · 41 Rates of chemical reaction · 38 Separation of mixtures and purification · 42 Solubility · 36 Water · 39

Question 121· Atomic structure and bonding· JAMB
Isotopes of an element have the same number of:
Explanation and discussion
Question 122· Atomic structure and bonding· WAEC
An atom of chlorine has mass number 37 and atomic number 17. How many neutrons does it contain?
Explanation and discussion
Question 123· Atomic structure and bonding· JAMB
The maximum number of electrons a p sub-shell can hold is
Explanation and discussion
Question 124· Atomic structure and bonding· JAMB
The bond between the two atoms in a nitrogen molecule (N₂) is
Explanation and discussion
Question 125· Atomic structure and bonding· WAEC
Isotopes of an element differ in their number of
Explanation and discussion
Question 126· Atomic structure and bonding· WAEC
The number of protons in an atom is its
Explanation and discussion
Question 127· Atomic structure and bonding· JAMB
Across a period from left to right, the first ionisation energy generally
Explanation and discussion
Question 128· Atomic structure and bonding· WAEC
The electronic configuration of an atom with atomic number 12 is
Explanation and discussion
Question 129· Atomic structure and bonding· JAMB
An element with atomic number 19 belongs to group
Explanation and discussion
Question 130· Atomic structure and bonding· WAEC
The negatively charged particle in an atom is the
Explanation and discussion
Question 131· Atomic structure and bonding· WAEC
Chlorine, bromine and iodine have similar chemical properties because they have the same number of
Explanation and discussion
Question 132· Atomic structure and bonding· JAMB
A dative (coordinate) covalent bond is present in
Explanation and discussion
Question 133· Atomic structure and bonding· JAMB
The shape of the methane molecule is
Explanation and discussion
Question 134· Atomic structure and bonding· WAEC
The bond between hydrogen and chlorine in a hydrogen chloride molecule is
Explanation and discussion
Question 135· Atomic structure and bonding· WAEC
Across a period from left to right, atomic radius
Explanation and discussion
Question 136· Atomic structure and bonding· JAMB
Chlorine consists of 75% ³⁵Cl and 25% ³⁷Cl. Find its relative atomic mass.
Explanation and discussion
Question 137· Atomic structure and bonding· JAMB
Metallic bonding consists of
Explanation and discussion
Question 138· Atomic structure and bonding· JAMB
An element has 11 protons and 12 neutrons. Its mass number is:
Explanation and discussion
Question 139· Atomic structure and bonding· JAMB
The period of an element in the periodic table shows the number of
Explanation and discussion
Question 140· Atomic structure and bonding· WAEC
An atom with 11 protons and 12 neutrons has a mass number of
Explanation and discussion

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JAMB and WAEC Chemistry questions

Isotopes of an element have the same number of:

An atom of chlorine has mass number 37 and atomic number 17. How many neutrons does it contain?

The maximum number of electrons a p sub-shell can hold is

The bond between the two atoms in a nitrogen molecule (N₂) is

Isotopes of an element differ in their number of

The number of protons in an atom is its

Across a period from left to right, the first ionisation energy generally

The electronic configuration of an atom with atomic number 12 is

An element with atomic number 19 belongs to group

The negatively charged particle in an atom is the

Chlorine, bromine and iodine have similar chemical properties because they have the same number of

A dative (coordinate) covalent bond is present in

The shape of the methane molecule is

The bond between hydrogen and chlorine in a hydrogen chloride molecule is

Across a period from left to right, atomic radius

Chlorine consists of 75% ³⁵Cl and 25% ³⁷Cl. Find its relative atomic mass.

Metallic bonding consists of

An element has 11 protons and 12 neutrons. Its mass number is:

The period of an element in the periodic table shows the number of

An atom with 11 protons and 12 neutrons has a mass number of