1) What is the smallest unit of matter that retains the properties of an element? a) Compound b) Mixture c) Molecule d) Atom 2) What is the name for a group of atoms held together by chemical bonds? a) Isotope b) Molecule c) Ion d) Mixture 3) What are substances formed by the chemical combination of two or more elements? a) Atoms b) Molecules c) Compounds d) Mixtures 4) What is the term for a substance that cannot be broken down into simpler substances by chemical means? a) Compound b) Mixture c) Element d) Molecule 5) What are the three states of matter? a) Solid, liquid, gas b) Plasma, solid, liquid c) Gas, solid, fluid d) Liquid, solid, vapor 6) What is the process by which a physical change occurs in a substance without changing its chemical identity? a) Chemical reaction b) Physical change c) Decomposition d) Synthesis 7) What is the name for the positively charged particles in an atom? a) Protons b) Neutrons c) Electrons d) Ions 8) What is the name for the neutral particles in an atom? a) Protons b) Neutrons c) Electrons d) Ions 9) What is the name for the negatively charged particles in an atom? a) Protons b) Neutrons c) Electrons d) Ions 10) Bonus Question: What is the name for the process by which a substance absorbs heat and changes from a liquid to a gas? a) Condensation b) Evaporation c) Boiling d) Sublimation

Test About Chemistry

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