Explanation

When acids react with carbonates, they produce carbon dioxide gas, water, and a salt.

For example:

2HCl + Na2CO3 → 2NaCl + H2O + CO2.

Explanation

Sodium hydroxide (NaOH) is a strong electrolyte because it completely dissociates into ions in water.

It conducts electricity well.

It is used in many industrial processes.

Explanation

Non-electrolytes are substances that do not dissociate into ions in solution, so they do not conduct electricity.

Examples include sugar and pure water.

Explanation

Sodium carbonate (Na₂CO₃) is commonly known as soda ash.

It is used in glass making, detergents, and water softening.

Explanation

• When an electron jumps from a higher energy level to a lower energy level, it radiates energy.
• The electron releases this excess energy in the form of a photon (electromagnetic radiation) as it moves to a more stable, lower-energy state. 
•  Lower-Radiates/Emits energy.
• Lower- Higher: Absorbs energy. 

Last updated question by NA on 28 April 2026

Explanation

Explanation

A covalent bond forms when two atoms share one or more pairs of electrons.

This type of bonding typically occurs between non-metal atoms to achieve stable electron configurations.

Explanation

Ionization energy is the minimum energy needed to remove one electron from a gaseous atom in its ground state.

It reflects how tightly an electron is held — higher ionization energy means stronger attraction to the nucleus.

Explanation

In this reaction, two reactants (CaO and CO₂) combine to form a single product (CaCO₃).

This is the definition of a combination (or synthesis) reaction.

Explanation

The empirical formula shows the simplest whole-number ratio of atoms in a compound (e.g., CH₂O for glucose).

It does not reflect the actual number of atoms like the molecular formula does, just their simplest ratio.