A) Do an experiment.
B) Form a hypothesis.
C) Make an observation
D) Draw a conclusion.

A) An assumption without basis.
B) A proven conclusion.
C) A collection of data.
D) A provisional explanation that can be tested.

A) Observation.
B) Communication of results.
C) Experimentation.
D) Conclusion.

A) The scientific method is discarded.
B) The hypothesis is modified or a new one is proposed.
C) One moves directly to the conclusion.
D) The data are considered invalid.

A) Observation.
B) Conclusion.
C) Experimentation.
D) Communication of results.

A) They are the same.
B) The prediction comes before the hypothesis.
C) The hypothesis is the result of the experiment.
D) The prediction is what we’d expect to see if the hypothesis is correct.

A) The valence.
B) The atomic mass.
C) The number of neutrons
D) The atomic number.

A) The same reactivity.
B) The same number of energy levels.
C) The same atomic mass.
D) The same number of valence electrons.

A) The same number of valence electrons.
B) The same number of protons.
C) The same number of energy levels.
D) Similar chemical properties.

A) Noble gases.
B) Halogens.
C) Alkali metals.
D) Transition metals.

A) The number of neutrons in the nucleus.
B) The difference in electronegativity between atoms
C) The number of protons in the atom.
D) The atomic mass of the elements.

A) In ionic bonds, electrons are transferred; in covalent bonds, they are shared.
B) In ionic bonds, electrons are unequally attracted; in covalent bonds, equally attracted.
C) In both, electrons are equally shared.
D) In ionic bonds, electrons are shared; in covalent bonds, they are transferred.

A) Polar covalent.
B) Ionic.
C) Metallic.
D) Nonpolar covalent.

A) Polar covalent.
B) Metallic.
C) Nonpolar covalent.
D) Ionic

A) Ionic.
B) Polar covalent.
C) Nonpolar covalent.
D) Metallic.

A) Ionic
B) None of the above.
C) Nonpolar covalent.
D) Polar covalent.

A) The temperature of a liquid.
B) The amount of water in a substance.
C) The mass of an atom.
D) The acidity or alkalinity of a solution.

A) 10
B) 14
C) 7
D) 0

A) Neutral
B) None of the above
C) Acidic
D) Basic

A) Acidic
B) Radioactive
C) Alkaline
D) Neutral

A) Soap
B) Lemon juice
C) Pure water
D) Baking soda