Chemistry: Atomic & Molecular Structure

What is the smallest unit of an element that retains the properties of that element?

• Molecule

• Atom

• Proton

• Compound

Which subatomic particle carries a negative charge?

• Nucleus

• Neutron

• Proton

• Electron

What is the molecular geometry of a water molecule?

• Octahedral

• Linear

• Tetrahedral

• Bent

Describe the atomic structure of an atom.

• An atom consists of only protons in the nucleus

• Electrons are located in the nucleus of an atom

• The atomic structure of an atom includes protons and electrons only

• The atomic structure of an atom includes a nucleus composed of protons and neutrons, with electrons orbiting around the nucleus in energy levels.

What are isotopes?

• Different elements with the same number of neutrons.

• Atoms of different elements with different numbers of protons.

• Atoms of the same element with different numbers of neutrons.

• Molecules with the same atomic number.

How does the number of protons in an atom affect its atomic number?

• The number of protons in an atom is only related to its mass number, not its atomic number.

• The number of protons in an atom directly corresponds to its atomic number.

• The number of protons in an atom has no effect on its atomic number.

• The number of protons in an atom is inversely related to its atomic number.

What is the significance of valence electrons in chemical bonding?

• Valence electrons repel each other, preventing bonding

• Valence electrons are only present in noble gases

• Valence electrons have no impact on chemical bonding

• Valence electrons play a crucial role in forming chemical bonds between atoms.

Explain the difference between cations and anions.

• Cations are negatively charged ions, and anions are positively charged ions.

• Cations have a higher electron affinity than anions.

• Cations are positively charged ions, and anions are negatively charged ions.

• Cations are larger in size compared to anions.

How does the electron configuration of an atom determine its chemical properties?

• Chemical properties are determined by the number of protons in the nucleus

• The electron configuration has no impact on chemical properties

• The electron configuration dictates the atom's reactivity, bonding tendencies, and overall chemical behavior.

• Electron configuration only affects physical properties, not chemical ones

What is the Bohr model of the atom?

• The Bohr model of the atom suggests that protons and neutrons are located in the electron cloud.

• The Bohr model of the atom proposes that electrons are stationary within the nucleus.

• The Bohr model of the atom states that electrons move randomly around the nucleus.

• The Bohr model of the atom describes electrons orbiting the nucleus in specific energy levels.