Explanation

• When the pressure on a gas increases, the molecules are forced closer together, resulting in a higher density.
• This is because the volume of the gas decreases as the pressure increases, causing the molecules to be more concentrated.

Explanation

• Magnesium (Mg) is an alkaline earth metal that loses two electrons from its outer shell to form a divalent cation (Mg²⁺).
• This means that it typically loses two electrons to form compounds, resulting in a valency of +2.

Explanation

• Group IIIA (or group 13) elements, such as boron (B), aluminum (Al), and gallium (Ga), lose three electrons to form ions with a charge of +3.
• This means that they typically form compounds by losing three electrons, resulting in a valency of +3.

Explanation

• Atomic radius decreases along a period as you move from left to right.
• This is because the number of protons in the nucleus increases, which pulls the electrons closer to the nucleus, resulting in a smaller atomic radius.

Explanation

The reaction where larger hydrocarbons (like C₈H₁₈) break into smaller ones (like C₃H₆ and fragments) is called cracking.

Cracking is commonly used in the petroleum industry to produce smaller, more useful hydrocarbons such as alkenes and gasoline.

Explanation

Laughing gas is the common name for nitrous oxide (N₂O), a colorless gas with a slightly sweet smell.

It acts as a mild anesthetic and analgesic.

It is often used in dentistry and surgery.

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

The percentage yield is the most common measure of efficiency in chemical reactions, comparing actual yield to theoretical yield.

Explanation

Spectroscopy is the study of the interaction between light (electromagnetic radiation) and matter.

This interaction can occur with atoms, molecules, or ions in any state (solid, liquid, gas, or plasma).

Explanation

The value of Kc (equilibrium constant) increases when the concentration of the product increases.

This is because Kc is a measure of the ratio of products to reactants at equilibrium.

A higher product concentration means a greater tendency for the reaction to proceed in the forward direction.