Integrated Physics and Chemistry-Unit 3: Matter and Change-Test

a. 3 b. 13 c. 31 d. 2 a. 3

According to the periodic table, how many electrons does gallium (#31) have in its valence level?

a. yes b. no a. yes

Is the following chemical equation balanced? 2Na + 2H2O -> 2NaOH + H2

a. 0.5 b. 1.0 c. 5.0 d. 10 d. 10

20 grams of ice will require___calories to raise the temperature 1 c

a. ionic b. metallic c. covalent d. neutral c. covalent

A bond exists between A and B in the compound AB. A and B are sharing electrons. The type of bond is ____.

a. hydrogen atom b. helium atom c. carbon atom d. uranium atom b. helium atom

An alpha particle is identical to the nucleus of a(n) _____.

a. ions b. isotopes c. neutrons d. protons b. isotopes

Atoms of the same element but with different atomic masses are called _____.

a. chemical reaction b. physical reaction c. nuclear reaction a. nuclear reaction

Fusion is a type of _____.

a. its temperature increases b. the number of intermolecular bonds decreases c. the space between particles increases d. the particles move faster a. b. c. and d.

If a substance is not at its melting or boiling point, as the heat content of a sample of matter increases, _____.

a. a salt b. neutral water c. a salt and water d. a metal and water c. a salt and water

If an acid and a base react, the product(s) will be _____.

a. The substance is melting or freezing b. The substance is in the liquid state. c. The substance is in the gaseous state. d. The substance is boiling or condensing d. The substance is boiling or condensing

If in the following diagram the substance is in solid form during stage 1, what is happening during stage 4?

a. 2 b. 3 c. 5 d. 6 d. 6

The following balanced equation shows the synthesis of ammonia (NH3). According to this equation, how many hydrogen atoms are in the final product? N2 + 3H2 ->2NH3

a. True b. False b. False

The following nuclear reaction is balanced.

a. synthesis b. decomposition c. single replacement d. double displacement e. neutralization a. synthesis

The following reaction shows the process of rusting. 4Fe + 3O2 -> 2Fe2O3 This chemical reaction should be classified as _____.

a. 4 b. 50 c. 25 d. 2 d. 2

The half-life of a certain element is 100 days. How many half-lives will it be before only one-fourth of this element remains?

a. weak acid b. strong acid c. weak base d. strong base a. weak acid

The indicated interval represents a _____.

a. True b. False a. True

The law of conservation of mass applies to all chemical reactions.

a. protons to electrons b. neutrons to protons c. isotopes to neutrons d. neutrinos to gamma rays b. neutrons to protons

The stability of atomic nuclei seems to be related to the ratio of _____.

a. H+ b. H3O- c. H(OH) d. OH- d. OH-

The symbol for the hydroxide ion is _____.

a. protons b. neutrons c. nucleus d. electrons d. electrons

What part of the atom is involved in chemical reactions?

a. alpha particles b. beta particles c. gamma rays b. beta particles

What type of radiation is carbon emitting in the following equation?

a. b. and c.

Which of the following are characteristics of bases.

a. silver atoms b. argon atoms c. sodium and chlorine atoms d. carbon and chlorine atoms d. copper and fluorine atoms

Which of the following are likely to form a covalent bond?

a. copper atoms b. hydrogen atoms c. hydrogen and oxygen atoms d. copper and fluorine atoms d. copper and fluorine atoms

Which of the following are likely to form an ionic bond?

b. and d.

Which of the following are true about a block of ice at -10 C as you continue to apply heat.

a. combustion b. bubbles forming in soda c. photosynthesis d. fireworks c. photosynthesis

Which of the following is an example of an endothermic reaction?

a. the atmosphere of stars b. the vapor of super-heated water c. the super-hot material released from a volcano d. clouds in our sky a. the atmosphere of stars

Which of the following is an example of plasma?

a. helium b. hydrogen c. nitrogen d. oxygen a. helium

Which of the following is least likely to form bonds?

a. Two substances burst into flames on contact. b. A substance freezes. c. Bubbles form when two substances are combined. d. A solid forms when two substances are combined. b. A substance freezes

Which of the following is not an indication of a chemical reaction?

a. The melting and freezing points of a substance are the same. b. The melting and boiling points of a substance are the same. c. The freezing and boiling points of a substance are the same. d. The heat of fusion and the heat of vaporization for a substance are the same. a. The melting and freezing of a substance are the same.

Which of the following statements is true?

a. boron b. aluminum c. gallium d. selenium d. selenium

Which of the following would not have the same number of valence electrons as the others?