Explanation

• A Decomposition Reaction is a type of chemical reaction where a single compound breaks down into two or more simpler substances.
• This is the opposite of a Combination Reaction, where two or more substances combine to form a new compound.

Last verified on 07-11-2026

Explanation

• The chemical formula of baking soda is NaHCO₃, which stands for sodium bicarbonate.
• The chemical name of baking soda is sodium hydrogen carbonate or sodium bicarbonate (NaHCO3).
• Sodium bicarbonate is non flammable
• Baking soda is basic in nature.

Last verified on 03-09-2026

Explanation

• Carbon dioxide has a linear molecular geometry.
• The bond angle is 180 degrees.
• Its two carbon-oxygen double bonds are arranged in opposite directions.

Last verified on 07-11-2026

Explanation

• Two oxygen atoms share two pairs of electrons.
• This creates a double covalent bond.
• Each oxygen atom achieves a stable outer electron configuration.

Last verified on 07-11-2026

Explanation

• Electronegativity is the ability of an atom to attract electrons.
• The highest electronegativity value is for fluorine (F), which is 3.98 on the Pauling scale.

Last verified on 07-11-2026

Explanation

• Noble gases like helium, neon, and argon are placed in Group VIII (Group 18 in modern IUPAC numbering).
• They are inert.
• They have a full outer electron shell.
• It making them stable and unreactive.

Last verified on 07-11-2026

Explanation

The formula to calculate max electrons in an orbit is 2n², where n = orbit number.

1. 1st orbit (n = 1): 2 × 1² = 2 electrons
2. 2nd orbit (n = 2): 2 × 2² = 8 electrons
3. For the 3rd orbit (n = 3): 2 × 3² = 18 electrons

Last verified on 07-11-2026

Explanation

• Sir James Chadwick discovered the neutron in 1932.
• He was a British physicist.
• His discovery completed the basic picture of the atomic nucleus.
• He received the Nobel Prize in Physics in 1935 for this discovery.

Additional information:

• J. J. Thomson – Electron (1897)
• Ernest Rutherford – Atomic nucleus (1911) and Proton (1917)

Last updated by NA on 05-11-2026

Explanation

• The instrument used to measure temperature is called a thermometer.
• A thermometer shows how hot or cold an object or place is.

Additional information:

• Barometer measures air pressure.
• Hygrometer measures humidity (moisture in air).

Last verified on 16-06-2026

Explanation

• Halogens belong to Group 17 (VIIA) of the periodic table.
• They are located in different periods: fluorine (2), chlorine (3), bromine (4), iodine (5), astatine (6) and tennessine (7).
• They have seven electrons in their outermost shell.

Last verified on 07-11-2026