9189 L3 P2 elec

What is at the centre of every atom?

• Electrons

• Protons only

• Neutrons only

• Nucleus

What particles orbit the nucleus of an atom?

• Protons

• Neutrons

• Electrons

• Molecules

What charge do protons have?

• Negative

• Neutral

• Positive

• No charge

What charge do electrons have?

• Positive

• Neutral

• Negative

• No charge

What charge do neutrons have?

• Positive

• Negative

• Neutral

• No charge

According to the electron theory, what are molecules made up of?

• Atoms

• Neutrons

• Protons

• Electrons

Are atoms considered to be solid?

• Yes, they are solid

• No, they are not solid

• Yes, but only when combined with molecules

• No, but they become solid when combined with electrons

What do all atoms possess an equal number of to be electrically neutral?

• Positively charged electrons and negatively charged protons

• Positively charged protons and negatively charged electrons

• Negatively charged neutrons and positively charged electrons

• Positively charged neutrons and negatively charged protons

What is the nucleus of an atom made of?

• Electrons

• Neutrons

• Protons

• Photons

What charge do protons have?

• Negative

• Neutral

• Positive

• Variable