Atomic Structure and Properties

The video tutorial introduces key atomic concepts, including atomic number, mass number, and atomic charge. It explains how atoms are organized in the periodic table by atomic number, using carbon as an example. The mass number is defined as the sum of protons and neutrons, and the video demonstrates how to calculate it. The concept of atomic charge is explored, highlighting how atoms can become ions by gaining or losing electrons. Finally, the tutorial shows how to represent an atom's information using chemical symbols, including atomic and mass numbers.

What does the atomic number of an element represent?

• The total number of neutrons

• The number of protons in the nucleus

• The sum of protons and neutrons

• The total number of electrons

Which element has an atomic number of 6?

• Carbon

• Nitrogen

• Oxygen

• Helium

How is the mass number of an atom calculated?

• By subtracting the number of electrons from protons

• By adding the number of protons and neutrons

• By adding the number of protons and electrons

• By counting only the neutrons

If an atom has 6 protons and 7 neutrons, what is its mass number?

• 12

• 13

• 7

• 6

What happens to an atom when it gains or loses electrons?

• Its atomic number changes

• It becomes an ion

• Its mass number changes

• It becomes a different element

What is the charge of an atom with equal numbers of protons and electrons?

• Variable

• Negative

• Neutral

• Positive

What term is used for an atom with a charge?

• Compound

• Molecule

• Ion

• Isotope

Where is the atomic number placed in the chemical symbol representation of an element?

• As a subscript on the left

• As a superscript on the right

• As a superscript on the left

• As a subscript on the right

In the chemical symbol representation, where is the mass number placed?

• As a subscript on the left

• As a superscript on the left

• As a superscript on the right

• As a subscript on the right

What information can be derived from the chemical symbol of an element?

• Both atomic and mass numbers

• Only the charge

• Only the mass number

• Only the atomic number