Oxygen, Nitrogen, and Hydrogen are all diatomic molecules at room temperature.

Phosphorus is a key component in fertilizers, promoting plant growth.

Carbon is essential for photosynthesis as plants convert carbon dioxide into glucose.

Acetic acid (CH3COOH) is a weak acid that does not completely dissociate in solution.

Sodium is an alkali metal, found in Group 1 of the periodic table, characterized by its high reactivity.

C2H5OH is ethanol, which is an alcohol.

Magnesium reacts with hydrochloric acid to form magnesium chloride (MgCl2) and hydrogen gas.

Phenolphthalein is commonly used for strong acid-strong base titrations as it changes color at pH 8.2-10.

Phenolphthalein is suitable as it changes color around pH 7-10, which is ideal for strong acid-strong base titrations.

Non-metals are generally brittle in solid form and do not exhibit malleability or ductility.

In the reaction 2H2 + O2 → 2H2O, hydrogen is oxidized and oxygen is reduced, making it a redox reaction.

Dissolving sugar in water is a physical change because it can be reversed by evaporation.

Gold is known to be the least reactive metal, making it resistant to corrosion and oxidation.

Gold is known to be the most malleable metal, capable of being drawn into extremely thin sheets.

Silver is the best conductor of electricity among metals due to its high electron mobility.

Copper is widely used in electrical wiring due to its excellent conductivity.

Sodium reacts vigorously with water to produce sodium hydroxide and hydrogen gas.

Chlorine is a non-metal that exists as a gas at room temperature.

Nitrogen is a key component of DNA, forming part of the nucleotides that make up the genetic code.

Both liquids and gases can flow due to the freedom of movement of their particles.

In solids, particles are tightly packed and can only vibrate in fixed positions.

Solids have the least amount of energy compared to liquids, gases, and plasmas due to their tightly packed particles.

Liquids have a definite volume but take the shape of their container, as their particles are less tightly packed than in solids.

Liquids have a fixed volume but take the shape of their container.