2. When atoms become ions, they typically achieve A. a more stable nucleus
B. a full valence shell of electrons
C. an equal number of protons and electrons
D. an octet of protons
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Match the acid base pairs by arranging the acid name with the conjugate base formula. hydrogen carbonate hydrogen phosphate carbonic acid read water sulfuric acid phosphoric acid a. co32- b. hso4- c. hco3- d. po43- e. h2po4- f. oh-

Which statement best describes the relationship between period and frequency of light waves? a) in wave b the period increases and the frequency decreases from wave a. b) in wave a the period increases and the frequency decreases from wave b. c) in wave b the period is shorter and the frequency is greater than in wave a. d) in wave a the period is shorter and the frequency is greater than in wave b.

How could a student test the effect of removing heat from a gas that is stored in a sealed container? what must occur in order for matter to change states?