Explanation

• Atoms that gain electrons become negatively charged ions.
• These are known as Anions.

Explanation

In the modern periodic table, there are 18 groups (vertical columns) and 7 periods (horizontal rows).

Explanation

• A spectrum of light is the distribution of light into its individual colours.
• Typically displayed in the order of red, orange, yellow, green, blue, indigo, and violet (ROYGBIV).
• This is often seen in the form of a rainbow or produced through the use of a prism.

Explanation

• Nuclear energy is a form of energy that is stored in the nucleus of an atom of an element.
• It is the energy that holds the protons and neutrons together in the nucleus.
• It can be released through nuclear reactions such as fission or fusion.

Explanation

• Acceleration is not a base quantity.

The base quantities are:

• Length (L)
• Mass (M)
• Time (T)

Explanation

• A chemical change, also known as a chemical reaction.
• It is a process that alters the composition of one or more substances, resulting in the formation of new substances with different properties.

Explanation

• The formula 2n^2 helps in determining the maximum number of electrons present in an orbit, where n is the principal quantum number (energy level).
• This formula is based on the Aufbau principle and the Pauli exclusion principle, which describe how electrons occupy energy levels in an atom.

Explanation

• Gravity is the force that pulls objects towards the Earth.
• Keeping us and everything else on the ground.

Explanation

• The speed of sound is maximum in gold, with a value of approximately 3240 meters per second (m/s).

The speed of sound in different materials:

• Air: 332 m/s
• Sea water: 1530 m/s
• Lead: 2160 m/s
• Gold: 3240 m/s
• Brick: 3650 m/s
• Copper: 4760 m/s
• Glass: 5100 m/s
• Aluminium: 6420 m/s

Explanation

• The solubility of a solute substance increases as the temperature of the solvent (liquid) increases.
• This is because heat energy helps to break the bonds between the solute particles and the solvent molecules, allowing more solute to dissolve.