Integrated Science 7Th Edition By Bill Tiller – Test Bank

Integrated Science 7Th Edition By Bill Tiller – Test Bank

Integrated Science, 7e (Tillery)

Chapter 9 Chemical Reactions

1) A mixture can be distinguished from a pure substance because it can be separated by physical means.

2) The representative elements have one to eight valence electrons.

3) An atom becomes a positive ion by gaining an electron.

4) Atoms gain or lose electrons in chemical reactions in order to increase their energy state.

5) Atoms gain or lose electrons in order to attain a valence orbital arrangement like that of a noble gas.

6) Ionic bonds occur between atoms from adjacent chemical families in the periodic table.

7) A covalent bond is a shared pair of electrons.

8) Three hydroxide ions are needed to form a neutral ionic compound with an aluminum ion.

9) The “-ide” ending in nitrogen dioxide tells you that this is an ionic compound.

10) The “2” in Mg(OH)2 tells you that the charge of the hydroxide ion is (-2).

11) The smallest unit of a covalent compound that still retains the properties of the compound is called a(an)

1. A) electron.
2. B) atom.
3. C) molecule.
4. D) dipole.

12) Evidence of a chemical reaction includes

1. A) a color change.
2. B) a change in temperature.
3. C) the production of a gas.
4. D) All of these.

13) In an ionic compound, the metal

1. A) usually forms a negative ion.
2. B) takes the “-ide” ending.
3. C) has a Greek prefix like mono, di or tri.
4. D) is written first.

14) Ionic compounds are generally

1. A) white, crystalline solids.
2. B) gaseous substances.
3. C) syrupy liquids.
4. D) amorphous solids.

15) The formation of an ionic bond

1. A) involves a transfer of one or more electrons.
2. B) results in a release of energy.
3. C) helps atoms achieve a noble gas electron arrangement.
4. D) All of these.

16) The amount of energy released when wood is burned is

1. A) greater than the amount of solar energy absorbed during its formation.
2. B) equal to the amount of solar energy absorbed during its formation.
3. C) less than the amount of solar energy absorbed during its formation.
4. D) greater or less than the amount of solar energy absorbed during its formation, depending on how it is burned.

17) Atoms that have eight valence electrons would tend to

1. A) be very reactive.
2. B) be inert.
3. C) form positive ions.
4. D) form negative ions.

18) The formation of a positive ion

1. A) occurs when an atom gains a proton.
2. B) involves a release of energy.
3. C) occurs when an electron is removed from an atom.
4. D) occurs in covalent bonding.

Consider the electron dot diagram of the unknown element X:

19) This atom would most likely

1. A) form an ion of +6 charge.
2. B) react with hydrogen to form H2
3. C) lose two electrons when forming an ion.
4. D) form an ion of +2 charge.

20) What type of chemical bond does the sharing of a pair of electrons form?

1. A) covalent
2. B) ionic
3. C) metallic
4. D) double

21) Atoms of an element tend to gain or lose electrons so that they will

1. A) have the same number of protons as electrons.
2. B) become electrically neutral.
3. C) have the same number of outer orbital electrons as a noble gas.
4. D) have the same outer shell arrangement as a metal.

22) Which combination of elements results in the formation of a white crystalline solid that dissolves to form a solution that conducts electricity?

1. A) metal and metal
2. B) non-metal and non-metal
3. C) metal and non-metal
4. D) metal and metalloid

23) Atoms from an element in group IIA are allowed to react with atoms from an element in group VIIA. What type of compound is likely to form?

1. A) ionic
2. B) covalent
3. C) polar covalent
4. D) none at all

24) A chemical bond that involves somewhat unequal sharing of electrons is called

1. A) ionic.
2. B) covalent.
3. C) polar.
4. D) coordinate.

25) What is the correct name for the compound, CaF2?

1. A) calcium fluorine
2. B) calcium fluoride
3. C) calcium difluoride
4. D) monocalcium difluoride

26) What products are formed from the complete reaction of hydrocarbons or carbohydrates with oxygen?

1. A) CO2+ H2O
2. B) CO + H2O
3. C) CH4+ CO2
4. D) CO2+ H2

27) In a redox reaction, reduction is defined as the

1. A) gain of electrons by an atom.
2. B) loss of mass of an atom.
3. C) loss of electrons by an atom.
4. D) gain of mass of an atom.

28) To what chemical reaction class does this reaction belong?

CaCO3(s)→CaO(s) + CO2(g)

1. A) combination
2. B) ion exchange
3. C) decomposition
4. D) replacement

29) To what chemical reaction class does this reaction belong?

2 Mg(s) + O2(g)→2 MgO(s)

1. A) combination
2. B) ion exchange
3. C) decomposition
4. D) replacement

30) Which is the more active metal?

1. A) silver
2. B) lead
3. C) zinc
4. D) sodium