Explanation

An atom consists of three subatomic particles:

1. Protons (positively charged)
2. Neutrons (neutral)
3. Electrons (negatively charged)

Additional Information:

• A neutral atom has equal protons and electrons; imbalance creates ions.
• Discovered by John Dalton in 1808 (Atomic Theory).
• Cation = positive ion.
  Anion = negative ion.
• Isotopes = same element with different neutrons.

Last verified on 09-11-2026

Explanation

• - Definition: Splitting of a heavy nucleus into smaller nuclei.
• - Trigger: Often absorbs a neutron.
• - Examples: Uranium-235 and Plutonium-239.
• - Energy: Releases a large amount of energy.
• - Neutrons: Can produce a chain reaction.
• - Uses: Nuclear power generation and nuclear weapons.

Last updated 08 Nov 2026 by NA 

Explanation

Water molecules are held together by hydrogen bonds,

It is a type of strong intermolecular force

Where the slightly positive hydrogen of one molecule attracts the slightly negative oxygen of another, creating a "sticky" network that gives water unique properties like surface tension.

Explanation

• The female gametophyte of angiospermic plants is the embryo sac.
• It is also known as the megagametophyte.
• It is the haploid (containing one set of chromosomes) structure within the ovule that contains the egg cell.
• It is responsible for fertilization.

Last verified on 06-11-2026

Explanation

• Only about 2.5% or 0.025 (3%) of the water on Earth is freshwater, which is vital for human consumption, agriculture, and ecosystem health.
• The remaining 97.5% (97%) is saltwater, found in oceans, seas, and salt lakes.

Last verified on 02-11-2026