Exploring Atomic Structure and the Periodic Table

What is the smallest unit of matter that retains the properties of an element?

• Atom

• Molecule

• Compound

• Particle

Which of the following is NOT true about the chemical symbols of elements?

• The first letter is always uppercase.

• They can have three letters.

• They can include both uppercase and lowercase letters.

• Some are derived from Latin.

Which element is represented by the symbol 'Al'?

• Gold

• Oxygen

• Aluminum

• Copper

What does the nucleus of an atom contain?

• Electrons and protons

• Neutrons and electrons

• Protons and neutrons

• Protons only

What charge does the nucleus of an atom carry?

• Negative

• Positive

• Neutral

• No charge

According to Bohr's model, how do electrons move around the nucleus?

• In random paths

• They do not move

• In fixed orbits

• In a cloud

What does the current atomic model suggest about electron movement?

• Electrons follow a predictable path

• Electrons appear more frequently in certain areas

• Electrons are stationary

• Electrons move in fixed paths

How many electrons can the first energy level hold?

• 32

• 8

• 2

• 18

What is the maximum number of electrons the outer energy level can hold, excluding hydrogen and helium?

• 32

• 8

• 18

• 2

Why can hydrogen and helium hold only two electrons in their outermost energy level?

• They have only one energy level

• They have no neutrons

• They are the smallest elements

• They are gases