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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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