Applied Final Review 1

Which of the following best describes the difference between an element and a compound?

• Elements contain only one type of atom, while compounds contain multiple types
• Elements are always gases, while compounds can be solids, liquids, or gases
• Elements cannot be broken down further, while compounds can always be separated
• Elements have a fixed composition, while compounds can vary in their makeup

What is the main difference between covalent and ionic bonding?

• Covalent bonds involve sharing electrons, while ionic bonds involve transferring electrons
• Covalent bonds are always stronger than ionic bonds
• Covalent bonds only occur between nonmetals, while ionic bonds only occur between metals
• Covalent bonds result in molecules, while ionic bonds always form crystals

Which of the following is NOT a physical property of matter?

• Melting point
• Density
• Reactivity with oxygen
• Boiling point

What happens to the atoms during a chemical reaction?

• Atoms are created or destroyed
• Atoms change into different elements
• Atoms are rearranged to form new substances
• Atoms lose their properties

Which of the following best explains why noble gases are unreactive?

• They have a full outer shell of electrons
• They are all radioactive
• They exist only as liquids
• They have no electrons

What is the primary difference between an acid and a base?

• Acids taste sour, bases taste bitter
• Acids are always liquids, bases are always solids
• Acids donate protons, bases accept protons
• Acids are flammable, bases are not

Which of the following is an example of a chemical change?

• Ice melting
• Sugar dissolving in water
• Iron rusting
• Salt crystals forming as water evaporates

What does the atomic number of an element represent?

• The number of neutrons in the nucleus
• The total number of protons and neutrons
• The number of protons in the nucleus
• The number of electron shells

Which of the following best describes the Law of Conservation of Mass?

• Matter can be created or destroyed in chemical reactions
• The total mass of reactants always equals the mass of products
• Mass is conserved only in physical changes
• Chemical reactions always result in a loss of mass

What is the primary function of the Periodic Table?

• To list all known chemical compounds
• To organize elements based on their physical properties
• To show the relationships between elements based on their atomic structure
• To provide instructions for conducting chemical experiments