Atoms and molecules

What is the theoretical representation of atoms called?

• Elemental diagram

• Molecular structure

• Chemical formula

• Atomic model

What is the region around the nucleus where electrons are likely found?

• Proton shell

• Neutron zone

• Electron cloud

• Nucleus

What is the central part of an atom that contains protons and neutrons?

• nucleus

• electron cloud

• shell

• core

What are the subatomic particles found within the nucleus?

• Quarks and leptons

• Photons and neutrinos

• Electrons and positrons

• Protons and neutrons

What is the total number of protons and neutrons in an atom known as?

• Mass number

• Nuclear charge

• Isotope count

• Atomic number

What does the atomic number represent in an atom?

• The atomic number indicates the mass of an atom.

• The atomic number represents the total number of electrons in an atom.

• The atomic number is the number of neutrons in an atom.

• The atomic number represents the number of protons in an atom.

What is the pathway or orbit of electrons around the nucleus called?

• Electron cloud

• Nuclear shell

• Electronsphere

• Orbitals

What is the outer electron shell that determines chemical bonding?

• Valence shell

• Electron cloud

• Inner shell

• Core shell

What is the mass of an atom primarily derived from?

• The mass of an atom is primarily derived from its protons and neutrons.

• The mass of an atom is primarily derived from its isotopes.

• The mass of an atom is primarily derived from its chemical bonds.

• The mass of an atom is primarily derived from its electrons.

What are variants of elements with different neutron numbers called?

• Allotropes

• Isotopes

• Ions

• Molecules