This video from IGCC Study Bud covers part one of topic two: atoms, elements, and compounds. It explains the differences between elements, compounds, and mixtures, and delves into atomic structure and the periodic table. The video also highlights the properties of subatomic particles and how to calculate the number of neutrons in an atom. Viewers are encouraged to like, subscribe, and use YouTube Super Thanks to support the channel.

What is an element?

• A substance made of two or more different types of atoms

• A molecule composed of different elements

• A pure substance made up of only one type of atom

• A combination of two or more substances physically mixed together

Which of the following is an example of a compound?

• Hydrogen gas (H2)

• Water (H2O)

• Carbon (C)

• Oxygen gas (O2)

How can mixtures be separated?

• By chemical reactions

• By physical means

• By changing the elements

• By breaking chemical bonds

What is the smallest indivisible unit of an element?

• Electron

• Atom

• Compound

• Molecule

Which of the following is NOT a compound?

• O2

• NaCl

• CO2

• H2O

What particles are found in the nucleus of an atom?

• Protons and electrons

• Electrons only

• Neutrons and electrons

• Protons and neutrons

What is the relative charge of an electron?

• +2

• +1

• 0

• -1

What does the atomic number represent?

• The total number of protons and neutrons

• The average mass of all isotopes

• The number of protons in the nucleus

• The number of electrons in the outer shell

How is the mass number of an atom calculated?

• Number of protons only

• Number of protons plus number of neutrons

• Number of neutrons plus number of electrons

• Number of protons plus number of electrons

If an atom has 6 protons and a mass number of 12, how many neutrons does it have?

• 12

• 0

• 18

• 6