Understanding Atomic Structure and Charges

What are the basic units of chemical elements?

• Molecules

• Compounds

• Atoms

• Cells

Which part of an atom contains protons and neutrons?

• Electron cloud

• Nucleus

• Shells

• Rings

What kind of electrical charge do protons have?

• Negative

• No charge

• Positive

• Neutral

What kind of electrical charge do neutrons have?

• Positive

• Negative

• No charge

• Neutral

What kind of electrical charge do electrons have?

• Positive

• No charge

• Neutral

• Negative

Why are atoms electrically neutral?

• They have no charge

• They have more neutrons than protons

• The number of protons and electrons are equal

• The number of neutrons and electrons are equal

What are the paths where electrons move around the nucleus called?

• Nuclei

• Protons

• Shells or rings

• Clouds

Which electrons are involved in forming chemical bonds between atoms?

• All electrons

• Only electrons in the innermost shell

• Only electrons in the outermost shell

• No electrons

How many electrons are needed for stability in an atom with only one energy level?

• 1

• 2

• 6

• 8

Why is Helium considered a stable atom?

• It has 1 electron

• It has 2 protons

• Its first shell is full with 2 electrons

• It has no neutrons