Atomic Structure and Ion Charges

The video tutorial explains the periodic table's atomic number, which identifies elements by the number of protons in their nucleus. It also covers the mass number, which includes protons and neutrons, and the concept of isotopes, which are atoms of the same element with different masses due to varying neutron numbers. Additionally, the tutorial discusses ions, which are charged atoms resulting from the loss or gain of electrons, and how to denote these charges in shorthand notation.

What does the atomic number of an element represent?

• The number of protons in the nucleus

• The number of neutrons in the nucleus

• The average atomic mass of the element

• The total number of electrons in the atom

In a neutral atom, how does the number of electrons compare to the number of protons?

• The number of electrons is double the number of protons

• The number of electrons equals the number of protons

• There are fewer electrons than protons

• There are more electrons than protons

What is the mass number of an isotope?

• The total number of protons and electrons

• The total number of protons and neutrons

• The total number of neutrons and electrons

• The average atomic mass of the element

How do isotopes of the same element differ?

• In the chemical properties

• In the number of electrons

• In the number of neutrons

• In the number of protons

What happens to an atom when it loses electrons?

• It becomes positively charged

• It becomes an isotope

• It becomes negatively charged

• It remains neutral

What is a cation?

• An atom with equal protons and electrons

• An atom with more protons than electrons

• An atom with more neutrons than protons

• An atom with more electrons than protons

What does the ion charge indicate in shorthand notation?

• The excess or deficiency of electrons

• The number of neutrons in the atom

• The total atomic mass

• The number of protons in the atom

Where is the atomic number located in the shorthand notation of an element?

• Bottom right corner

• Top right corner

• Bottom left corner

• Top left corner

What does a negative ion charge signify?

• A deficiency of electrons

• An excess of electrons

• A deficiency of protons

• An excess of protons

If no number is written with the ion charge, what is assumed?

• The charge is two

• The charge is negative

• The charge is one

• The charge is zero