The Periodic Table: Atomic Number

The video tutorial explains the periodic table, focusing on atomic numbers, protons, electrons, and neutrons. It describes how each element has a unique atomic number, which is the number of protons in its atoms. The tutorial also covers how to calculate the number of neutrons using atomic weight and provides examples with carbon and helium to illustrate these concepts.

What does each block on the periodic table represent?

• A mixture

• A compound

• An element

• A molecule

What does the atomic number of an element indicate?

• The number of electrons

• The number of protons

• The atomic weight

• The number of neutrons

Why do normal atoms have a neutral charge?

• They have no protons or electrons

• They have equal numbers of protons and electrons

• They have more electrons than protons

• They have more protons than electrons

How can you find the number of neutrons in an element?

• By dividing the atomic weight by the atomic number

• By multiplying the atomic number by the atomic weight

• By adding the atomic number and atomic weight

• By subtracting the atomic number from the atomic weight

If helium has an atomic number of 2 and an atomic weight of 4, how many neutrons does it have?

• 4

• 1

• 2

• 3