Atomic Structure and Isotopes

This video tutorial covers the basics of chemistry, focusing on the nature of atoms, chemical bonds, and compounds. It explains the role of water in life and introduces the major molecules of life. The tutorial delves into the structure of atoms, discussing subatomic particles like protons, neutrons, and electrons, and their characteristics. It also covers atomic number and mass, and how isotopes differ in neutron count, affecting atomic mass.

What are the four states in which matter exists?

• Solid, Liquid, Gas, Water

• Solid, Liquid, Gas, Plasma

• Solid, Liquid, Gas, Ice

• Solid, Liquid, Gas, Vapor

Which six elements make up 95% of the body weight of living organisms?

• Carbon, Hydrogen, Oxygen, Nitrogen, Potassium, Sulfur

• Carbon, Hydrogen, Oxygen, Nitrogen, Phosphorus, Sulfur

• Carbon, Helium, Oxygen, Nitrogen, Phosphorus, Sulfur

• Carbon, Hydrogen, Oxygen, Neon, Phosphorus, Sulfur

What is the charge of a proton?

• Variable

• Neutral

• Negative

• Positive

Where are electrons located in an atom?

• Inside the nucleus

• Orbiting around the nucleus

• In the center of the atom

• In the outer shell only

What does the atomic number of an element represent?

• The total number of protons and neutrons

• The number of neutrons in the nucleus

• The number of electrons orbiting the nucleus

• The number of protons in the nucleus

How is the atomic mass of an element calculated?

• By adding the number of protons and electrons

• By adding the number of protons and neutrons

• By multiplying the number of protons and neutrons

• By subtracting the number of neutrons from protons

What happens when the number of neutrons in an atom changes?

• The atomic number changes

• The atom becomes an isotope

• The element changes

• The atom becomes unstable

What is an isotope?

• Atoms with the same number of protons and neutrons

• Atoms with the same number of electrons but different protons

• Atoms with the same number of neutrons but different protons

• Atoms with the same number of protons but different neutrons

How many neutrons are in a carbon-14 atom?

• 6

• 7

• 8

• 14

What is the average atomic mass of carbon as seen on the periodic table?

• 12.01

• 15.01

• 13.01

• 14.01