The chemical elements of the periodic table sorted by atomic number

The Periodic Table of Elements Quiz Test

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Quiz Questions And Answers

An atom of an element has the electronic configuration [Kr] 5s2 4d10 5p6. Which Period and Group in the Periodic Table does it belong to?

Period 4; Group VIII

Period 5; Group VI

Period 5; Group 0

Why is it that the reactivity of Group I metals increases down the group?

Number of electrons increases down the group.

Ionization energy increases down the group.

Atomic radius increases down the group.

Which of the following is correct about Group VII elements?

They are all gases at room temperature and pressure.

Reactivity increases down the group.

Oxidising power decreases down the group

Why is it that noble gases are often used to fill the empty space in electric bulbs?

They are abundant and easily obtained.

They are inert.

They have low densities.

Transition metals and their compounds are often used as catalysts in industrial processes. Why is that so?

They form coloured compounds, which can be easily separated from other reagents in reactions.

They have high melting and boiling points, which make them suitable for the high termperatures of industrial processes.

They have a partially-filled d-subshell.

Element X dissolves in water to give a colourless and odourless gas. It reacts with Cl2 to give a white solid XCl. Which could be the identity of X ?

Argon

Sodium

Iodine

Which of the halogen below has the strongest oxidising power?

Fluorine

Chlorine

Iodine

When a halogen Y is added to a colourless solution of potassium iodide, the colourless solution turns brown. Which of the following CANNOT be the identity of Y?

Fluorine

Chlorine

Bromine

An element Z forms a green compound ZO with oxygen. When exposed to air, the green solid slowly turns red-brown and becomes Z2O3. What property of Z does this show?

It is a metal.

It has variable oxidation states.

It has high oxidising power.

The charge of an atom is

Positive

Negative

Neutral

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