Nuclide Symbols: Atomic Number, Mass Number, Ions, and Isotopes

The video explains nuclide symbols, atomic and mass numbers, and how they relate to protons, neutrons, and electrons. It covers the representation of atoms using nuclide symbols, including atomic and mass numbers, and discusses isotopes and ions. The periodic table's arrangement by atomic number and the concept of average atomic mass are also explained, using chlorine as an example.

What determines the atomic number of an element?

• The total mass of the atom

• The number of protons

• The number of neutrons

• The number of electrons

How is the mass number of an atom calculated?

• By multiplying the number of neutrons by protons

• By subtracting the number of electrons from protons

• By adding the number of protons and neutrons

• By adding the number of protons and electrons

What is an isotope?

• An atom with a different number of protons

• An atom with a different number of electrons

• An atom with a different atomic number

• An atom with a different number of neutrons

Where is the charge of an ion indicated in a nuclide symbol?

• To the bottom left

• To the upper left

• To the bottom right

• To the upper right

Why do atomic masses on the periodic table have decimal values?

• Because they are rounded to the nearest whole number

• Because they represent the mass of the most abundant isotope

• Because they include the mass of electrons

• Because they are average masses of all isotopes