Explanation

• In the periodic table, a rows is considered to be a periods.
• Periods are the horizontal rows of elements in the periodic table.

Explanation

• Electronic configuration refers to the distribution of electrons within an atom or molecule.
• It shows how the electrons are arranged in different energy levels (shells) and sublevels (orbitals) around the nucleus.

Explanation

Carbon is a non-metal, found in forms like graphite and diamond.

Copper, iron, and chromium are all metals.

Explanation

Explanation

Diamond is an allotrope of carbon.

Hence, it is made up of carbon.

Diamond is a very expensive ornament.

It is composed of a single element carbon.

Explanation

Gases can dissolve in water.

The dissolving of a gas in water depends on the interaction between the molecules of the gas and the water molecules.

Oxygen, Carbon dioxide, and Nitrogen are mostly soluble gases in water.

Explanation

Potassium is the chemical element.

Symbol: K 

Atomic number: 19

Electron configuration: 4s1

Electrons per shell: 2, 8, 8, 1

Explanation

The M shell has 3 subshells: 3s, 3p, and 3d.

The K, L, and N shells have 1, 2, and 4 subshells, respectively.

Specifically, K has 1s, L has 2s and 2p, and N has 4s, 4p, 4d, and 4f. 

Explanation

Gas molecules move in random directions with high speed and energy.

This random motion leads to collisions with each other and the container walls.

Explanation

Sodium hydroxide (NaOH) is a strong alkali used in making soaps, detergents, and for cleaning clogged drains.

It helps break down grease and organic matter, making it effective in cleaning and sanitation tasks.