Atoms & Elements Quiz

What is the charge of a proton?

• +1
• -1
• 0
• +2

Which particle is found in the nucleus of an atom along with protons?

• Electron
• Neutron
• Positron
• Meson

What do you call an atom with the same number of protons but a different number of neutrons?

• Cation
• Anion
• Isotope
• Isoform

What does the atomic number of an element represent?

• The number of neutrons
• The number of protons
• The number of electrons in a neutral atom
• The total number of nucleons

Which of these is NOT a subatomic particle?

• Proton
• Neutron
• Electron
• Photon

What determines the chemical behavior of an atom?

• Number of neutrons
• Number of protons
• Number of electrons
• Number of isotopes

An ion with more protons than electrons is called what?

• Anion
• Cation
• Neutral atom
• Isotope

What does the term 'average atomic mass' refer to?

• The mass of the heaviest isotope
• The mass of an electron cloud
• The weighted average mass of all isotopes
• The mass of a single proton

In the Bohr model of the atom, what do the 'orbits' or 'shells' represent?

• Paths of neutrons
• Energy levels of electrons
• Trajectories of protons
• Potential barriers

What does the electron configuration of an element indicate?

• The distribution of protons
• The spin of subatomic particles
• The arrangement of electrons in shells
• The stability of the nucleus

How does an atom become a positive ion?

• By gaining protons
• By gaining electrons
• By losing protons
• By losing electrons

What is an atomic spectrum?

• A rainbow produced by a prism
• A graph of nuclear forces
• The wavelengths of light an atom can absorb or emit
• The range of mass numbers for an element's isotopes

What evidence supports the existence of energy levels in atoms?

• Continuous emission spectra
• Line emission spectra
• X-ray diffraction patterns
• Uniform absorption spectra

What happens when an electron transitions from a higher to a lower energy level?

• The atom loses a proton
• The atom absorbs a photon
• The atom emits a photon
• The nucleus becomes unstable

Which of the following is true about isotopes of the same element?

• They have different atomic numbers
• They have different chemical properties
• They have different numbers of neutrons
• They have different positions on the periodic table

What are valence electrons?

• Electrons closest to the nucleus
• Electrons in the innermost shell
• Electrons in the outermost shell
• Free electrons not associated with any atom

Which atomic particles are involved in chemical bonding?

• Neutrons
• Protons
• Electrons
• Nucleons