Understanding Atoms and Electrons

What is the main component of an atom's nucleus?

• Protons and electrons

• Neutrons and electrons

• Protons and neutrons

• Electrons and protons

What surrounds the nucleus of an atom?

• Electron cloud

• Proton cloud

• Photon cloud

• Neutron cloud

What charge do electrons carry?

• Neutral

• Negative

• Variable

• Positive

What is the primary role of electrons in atoms?

• To provide mass

• To form chemical bonds

• To emit light

• To stabilize the nucleus

What happens to an atom when it gains electrons?

• It becomes unstable

• It becomes neutral

• It becomes a positive ion

• It becomes a negative ion

What is the result of an atom losing electrons?

• It becomes a larger ion

• It becomes a smaller ion

• It becomes a neutral atom

• It becomes a radioactive atom

How does the size of a silicon atom change when it gains electrons?

• It remains the same

• It becomes smaller

• It becomes larger

• It becomes unstable

What charge does a silicon ion have after losing four electrons?

• 4+

• 2+

• 4-

• Neutral

What is the effect of an atom becoming an ion?

• It becomes radioactive

• It becomes inert

• It becomes reactive

• It becomes electrically balanced

What happens to the size of a silicon atom when it loses electrons?

• It remains the same

• It decreases

• It becomes unstable

• It increases