Chemistry-Atomic sturcture,Chemistry of the atomsphere and the using of resources

Question 1

What are atoms made of?

Answer 1

Protons, neutrons (in the nucleus), and electrons (orbiting the nucleus).

Question 2

What is the relative mass and charge of subatomic particles?

Answer 2

Proton: Mass = 1, Charge = +1.

Neutron: Mass = 1, Charge = 0.

Electron: Mass = negligible (~1/1836), Charge = -1.

Question 3

What is an isotope?

Answer 3

Atoms with the same number of protons but different numbers of neutrons.

Question 4

What gases are present in the atmosphere today?

Answer 4

Nitrogen (78%), Oxygen (21%), and trace gases (including CO₂, Argon, Water vapor).

Question 5

How did Earth’s early atmosphere form?

Answer 5

Volcanic activity released gases like CO₂, water vapor, ammonia, and methane.

Question 6

What caused oxygen levels to increase?

Answer 6

Photosynthesis by early algae and plants released oxygen.

Question 7

What are finite resources?

Answer 7

Natural resources that are limited and will eventually run out (e.g., fossil fuels, metals).

Question 8

What is potable water?

Answer 8

Water that is safe to drink, typically treated to remove contaminants.

Question 9

What is the purpose of recycling?

Answer 9

To reduce waste, save energy, and conserve finite resources.