Explanation

The charges of Proton, Electron, Neutron respectively are:

• Proton: Positive charge (+1)
• Electron: Negative charge (-1)
• Neutron: Neutral charge (0)

Explanation

• Heat is a form of energy associated with the motion of molecules in a substance.
• As molecules vibrate, rotate, and collide, they transfer energy from one another, resulting in the sensation of heat.

Explanation

• In the periodic table, a rows is considered to be a periods.
• Periods are the horizontal rows of elements in the periodic table.

Explanation

• The mass number (represented by the letter A) is defined as the total number of protons and neutrons in an atom.
• Consider the table below, which shows data from the first six elements of the periodic table.
• Consider the element helium.
• Its atomic number is 2, so it has two protons in its nucleus.

Explanation

The cooling fins at the back of a refrigerator are typically made of a black, rough surface to maximize heat radiation. This design:

• Increases the surface area for heat transfer
• Absorbs heat from the surrounding air
• Emits heat more efficiently due to the rough surface

Explanation

• Heat is a form of energy that flows from a region of high temperature to a region of low temperature.
• This flow of energy occurs through the transfer of kinetic energy from particles in motion.

Explanation

Isotopes of an element have the same number of protons.

Explanation

• Light from the Sun takes about 8 minutes to reach Earth due to the short distance of approximately 93 million miles.
• Light from Sirius, which is much farther away at about 8.6 light-years, takes approximately 8 years to reach us.

Explanation

• Transverse waves are waves where the particles of the medium oscillate perpendicular to the direction of wave propagation, creating crests and troughs.
• Examples include light waves, radio waves, and water waves.

Explanation

• During nighttime, the air above the land loses heat and cools down, causing its density to increase.
• This is because cool air contracts and becomes denser than warm air.