3rd Q Review #5

Test Description: Regents review up threw acid base

Instructions: Answer all questions to get your test result.

1) In the wave-mechanical model of the atom, an orbital is defined as

2) The greatest amount of energy released per gram of reactants occurs during a

3) A sample of helium gas is in a sealed, rigid container. What occurs as the temperature of the sample is increased?

4) Which terms identify types of chemical reactions?

5) Two forms of solid carbon, diamond and graphite, differ in their physical properties due to the differences in their

6) Which element is a liquid at STP?

7) In terms of entropy and energy, systems in nature tend to undergo changes toward

8) Which compounds are classified as Arrhenius acids?

9) Which formula represents a molecule with a polar bond?

10) One beneficial use of radioisotopes is

11) What is the number of pairs of electrons that are shared between the nitrogen atoms in a molecule of N2?

12) Which set of values represents standard pressure and standard temperature?

13) A gas changes directly to a solid during

14) A solid element that is malleable, a good conductor of electricity, and reacts with oxygen is classified as a

15) Three forms of energy are

16) Which nuclear emission has the greatest penetrating power?

17) The dating of geological formations is an example of a beneficial use of

18) A substance is classified as either an element or a

19) In the formula XF2, the element represented by X can be classified as a

20) Which atom in the ground state has the same electron configuration as a calcium +2 ion, Ca+2, in the ground state?


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