Subatomic Particles and Atomic Stability

Where are protons and neutrons found within an atom?

• In the electron cloud

• In the nucleus

• In the outermost shell

• Outside the atom

What are the three main subatomic particles that make up an atom?

• Protons, neutrons, and ions

• Protons, electrons, and molecules

• Protons, neutrons, and electrons

• Neutrons, electrons, and compounds

Which subatomic particle has a negative electrical charge?

• Proton

• Neutron

• Electron

• Nucleus

How many electrons are required in the outermost shell for an atom with only one energy level to be stable?

• One

• Two

• Eight

• Zero

What is the general rule for atoms with more than one energy level to achieve stability?

• They need 2 electrons in their outermost shell.

• They need 8 electrons in their outermost shell.

• They need to lose all their electrons.

• They need to gain protons.