Subatomic Particles and Atomic Structure

The video tutorial explains isotopes and atomic structure, focusing on the mass of subatomic particles like electrons, protons, and neutrons. It covers atomic and mass numbers using carbon as an example, and describes the structure and charge neutrality of hydrogen and helium atoms.

What is the primary composition of an atom's nucleus?

• Electrons and protons

• Protons and electrons

• Protons and neutrons

• Neutrons and electrons

How is the mass of an electron commonly expressed?

• 9.11 x 10^-31 kg

• 1.67 x 10^-27 kg

• 9.11 x 10^-27 kg

• 1.67 x 10^-31 kg

Which subatomic particle has a mass of approximately 1.675 x 10^-27 kg?

• Neutron

• Proton

• Photon

• Electron

What does the atomic number of an element represent?

• Number of protons

• Number of neutrons

• Number of isotopes

• Number of electrons

If a carbon atom has six protons, what is its atomic number?

• 0

• 18

• 6

• 12

What is unique about the hydrogen atom's nucleus?

• It contains two protons

• It contains no neutrons

• It contains no protons

• It contains two neutrons

What is the mass number of a hydrogen atom?

• 1

• 2

• 0

• 3

How many protons are present in a helium atom?

• Three

• One

• Four

• Two

What is the atomic number of helium?

• 1

• 3

• 2

• 4

How many neutrons are found in the nucleus of a helium atom?

• Two

• One

• Three

• Four