Explanation

NaCl is a classic example of an ionic compound

Where sodium (Na) loses an electron to become a positively charged ion (cation),

And chlorine (Cl) gains an electron to become a negatively charged ion (an anion).

Formula: NaCl

Molar mass: 58.44 g/mol

IUPAC ID: Sodium chloride

Melting point: 801 °C

Soluble in: Water, Ammonia, Ethanol, Glycerol, Methanol, Propylene glycol, Formic acid, Formamide

Classification: Salt

Boiling point: 1,465 °C

Explanation

Carbon dioxide (CO2) reacts with calcium hydroxide (Ca(OH)2.

It is also known as lime water to form a white precipitate of calcium carbonate (CaCO3), which turns the solution milky:

Ca(OH)2 + CO2 → CaCO3 + H2O

This reaction is often used as a test for carbon dioxide.

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

• Organic chemistry is the branch of chemistry that deals with hydrocarbons and their derivatives.
• They are compounds containing carbon and hydrogen atoms.
• It may also contain other elements like oxygen, nitrogen, and sulfur.

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

• The shielding effect decreases across a period.
• This is because the increasing nuclear charge is not fully counterbalanced by the same number of inner electrons, resulting in a weaker shielding effect.

Explanation

Acetic acid (CH3COOH) is a weak acid that only partially dissociates in water, forming a weak electrolyte solution.

It does not fully dissociate into ions like strong acids (like HCl) or strong bases (like KOH).

Explanation

Silver nitrate (AgNO3) is a strong oxidizing agent and a caustic substance.

It is also known as "lunar caustic" due to its historical use to treat lunar burns (sunburn).

Explanation

Chlorine (Cl) is a strong oxidizing agent.

It means it can accept electrons from other substances and cause them to be oxidized.

Explanation

Selenium (Se) is a metalloid, which means it exhibits some properties of metals and some properties of nonmetals.

Metalloids are elements that are intermediate in character between metals and nonmetals.