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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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