Chemistry Unit 1 Review

What are the subatomic particles in an atom?

• Protons, electrons, and neutrons

• Atoms and elements

• Positive and negative charges

• Like charges repel and unlike charges attract

What does the atomic number of an element represent?

• The number of protons in an atom

• The number of electrons in an atom

• The mass number of an atom

• The charge of an atom

What is the octet rule?

• Atoms form chemical bonds by sharing or transferring electrons to achieve a stable octet

• Atoms have eight valence electrons

• Atoms have eight protons and neutrons

• Atoms have eight energy levels

What is the difference between a compound and a molecule?

• A compound is composed of different elements in an ionic bond, while a molecule is composed of atoms in a covalent bond

• A compound is composed of atoms in a covalent bond, while a molecule is composed of different elements in an ionic bond

• A compound is composed of atoms in a covalent bond, while a molecule is composed of atoms in an ionic bond

• A compound is composed of different elements in an ionic bond, while a molecule is composed of atoms in a covalent bond

What are the two types of chemical bonds?

• Ionic bonds and covalent bonds

• Protons and neutrons

• Atoms and elements

• Positive and negative charges

What is the name of the positive ion?

• Cation

• Anion

• Proton

• Electron

What is the name of the negative ion?

• Anion

• Cation

• Proton

• Electron

What is the role of valence electrons in chemical bonding?

• Valence electrons are involved in the formation of chemical bonds

• Valence electrons determine the atomic mass of an element

• Valence electrons are responsible for the color of a compound

• Valence electrons have no role in chemical bonding

What is the difference between ionic and covalent bonds?

• Ionic bonds involve the transfer of electrons, while covalent bonds involve the sharing of electrons

• Ionic bonds involve the sharing of electrons, while covalent bonds involve the transfer of electrons

• Ionic bonds are formed between metals, while covalent bonds are formed between nonmetals

• There is no difference between ionic and covalent bonds

Whose atomic model do we still use today to show structure?

• Dalton

• Quartermann

• Bohr

• Schrodinger