Isotopes

This video tutorial explores the structure of atoms, focusing on isotopes. It explains that isotopes are variations of elements with the same number of protons but different numbers of neutrons, leading to different mass numbers. The video discusses why mass numbers in the periodic table are not whole numbers, due to the weighted average of isotopes. It also introduces radioisotopes, which are unstable and emit nuclear radiation. The tutorial encourages viewers to understand isotopes and their relation to the periodic table.

What is the mass number of an atom?

• The total number of protons and neutrons

• The total number of electrons

• The total number of neutrons

• The total number of protons

How do isotopes of an element differ from each other?

• By the number of protons

• By the number of electrons

• By their chemical properties

• By the number of neutrons

Why do isotopes have identical chemical properties?

• Because they have the same mass number

• Because they have the same number of neutrons

• Because they have the same number of electrons

• Because they have the same number of protons

Why are some mass numbers in the periodic table not whole numbers?

• Due to the presence of radioisotopes

• Because of the weighted average of isotopes

• Due to the presence of extra electrons

• Because of measurement errors

What are radioisotopes?

• Isotopes with extra electrons

• Stable isotopes

• Isotopes that emit nuclear radiation

• Isotopes with identical chemical properties