Understanding Isotopes

The video explains that all atoms of an element have the same atomic number, meaning the same number of protons. However, atoms can have different mass numbers due to varying numbers of neutrons, leading to isotopes. Isotopes are defined as atoms with the same number of protons but different numbers of neutrons. The video uses Carbon-12 and Carbon-14 as examples to illustrate isotopes, showing how they have the same atomic number but different masses. It also mentions other isotopes like Hydrogen and Chlorine. Despite having different masses, isotopes have identical chemical properties because these are determined by electrons, not neutrons.

What remains constant for all atoms of a particular element?

• Number of protons

• Number of electrons

• Number of neutrons

• Mass number

What causes the difference in mass number among atoms of the same element?

• Different number of neutrons

• Different number of electrons

• Different atomic numbers

• Different number of protons

Which of the following is true about isotopes?

• They have the same number of neutrons.

• They have the same number of protons.

• They have different numbers of protons.

• They have different chemical properties.

Why are Carbon and Nitrogen not considered isotopes?

• They have the same mass number.

• They have different numbers of protons.

• They have different numbers of neutrons.

• They have the same atomic number.

How many neutrons does Carbon-14 have?

• 12

• 8

• 14

• 6

Which of the following is an example of isotopes?

• Carbon and Nitrogen

• Hydrogen and Helium

• Chlorine-35 and Chlorine-37

• Oxygen-16 and Oxygen-18

What remains unchanged among isotopes of the same element?

• Atomic mass

• Chemical properties

• Number of neutrons

• Mass number

What is the main factor that differentiates isotopes of the same element?

• Number of protons

• Number of neutrons

• Atomic number

• Number of electrons

Which statement is true about the chemical behavior of isotopes?

• It is controlled by electrons.

• It is controlled by the number of protons.

• It is affected by the number of neutrons.

• It varies with mass number.