atom

What are the three main subatomic particles in an atom?

• Protons, electrons, photons
• Protons, neutrons, electrons
• Neutrons, electrons, positrons
• Protons, neutrons, photons

Which subatomic particle is positively charged and found in the nucleus of an atom?

• Neutrons
• Electrons
• Protons
• Photons

What is the role of neutrons in an atom?

• Create bonds with other atoms
• Determine chemical properties
• Control energy levels
• Stabilize the nucleus

How do isotopes of an element differ?

• In the atomic mass
• In the number of neutrons
• In the number of electrons
• In the number of protons

Where are electrons located in an atom?

• In the nucleus
• In the electron cloud
• In the neutron shell
• In the proton layer

What maintains the overall charge balance in an atom?

• Protons
• Neutrons
• Photons
• Electrons

Which model depicts electrons orbiting the nucleus in distinct energy levels?

• Bohr model
• Quantum mechanical model
• Electron cloud model
• Nuclear model

What does the quantum mechanical model describe in an atom?

• Electron charge
• Electron orbitals
• Proton arrangement
• Neutron stability

Why is understanding the structure of an atom crucial?

• To determine atomic mass
• To predict chemical reactions
• To comprehend atomic behavior
• To identify elements