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1 | |
The smallest unit of an element that can exist alone or in combination with other elements is the |
| | A) | electron. |
| | B) | atom. |
| | C) | molecule. |
| | D) | chemical bond. |
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2 | |
The smallest unit of a covalent compound that can exist while retaining the chemical properties of the compound is the |
| | A) | electron. |
| | B) | atom. |
| | C) | molecule. |
| | D) | ionic bond. |
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3 | |
You know that a chemical reaction is taking place if |
| | A) | the temperature of a substance increases. |
| | B) | electrons move in a steady current. |
| | C) | chemical bonds are formed or broken. |
| | D) | All of the above are correct. |
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4 | |
Chemical reactions that involve changes in the internal potential energy of molecules always involve changes of |
| | A) | the mass of the reactants as compared to the products. |
| | B) | chemical energy. |
| | C) | radiant energy. |
| | D) | the weight of the reactants. |
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5 | |
The energy released in burning materials produced by photosynthesis has what relationship to the solar energy that was absorbed in making the materials? It is |
| | A) | less than the solar energy absorbed. |
| | B) | the same as the solar energy absorbed. |
| | C) | more than the solar energy absorbed. |
| | D) | variable, having no relationship to the energy absorbed. |
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6 | |
The electrons that participate in chemical bonding are (the) |
| | A) | valence electrons. |
| | B) | electrons in fully occupied orbitals. |
| | C) | stable inner electrons. |
| | D) | all of the above. |
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7 | |
Atoms of the representative elements have a tendency to seek stability through |
| | A) | acquiring the noble gas structure. |
| | B) | filling or emptying their outer orbitals. |
| | C) | any situation that will satisfy the octet rule. |
| | D) | all of the above. |
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8 | |
An ion is formed when an atom of a representative element |
| | A) | gains or loses protons. |
| | B) | shares electrons to achieve stability. |
| | C) | loses or gains electrons to satisfy the octet rule. |
| | D) | All of the above are correct. |
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9 | |
An atom of an element that is in family VIA will have what charge when it is ionized? |
| | A) | 2 |
| | B) | 6 |
| | C) | 6 |
| | D) | 2 |
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10 | |
Which type of chemical bond is formed by a transfer of electrons? |
| | A) | ionic |
| | B) | covalent |
| | C) | metallic |
| | D) | All of the above are correct. |
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11 | |
Which type of chemical bond is formed between two atoms by the sharing of two electrons, with one electron from each atom? |
| | A) | ionic |
| | B) | covalent |
| | C) | metallic |
| | D) | any of the above. |
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12 | |
Salts, such as sodium chloride, are what type of compounds? |
| | A) | ionic compounds |
| | B) | covalent compounds |
| | C) | polar compounds |
| | D) | Any of the above are correct. |
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13 | |
If there are two bromide ions for each barium ion in a compound, the chemical formula is |
| | A) | 2Br1Ba. |
| | B) | Ba2Br. |
| | C) | BaBr2. |
| | D) | none of the above. |
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14 | |
Which combination of elements forms crystalline solids that will dissolve in water, producing a solution of ions that can conduct an electric current? |
| | A) | metal and metal |
| | B) | metal and nonmetal |
| | C) | nonmetal and nonmetal |
| | D) | All of the above are correct. |
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15 | |
In a single covalent bond between two atoms, |
| | A) | a single electron from one of the atoms is shared. |
| | B) | a pair of electrons from one of the atoms is shared. |
| | C) | a pair of electrons, one from each atom, is shared. |
| | D) | a single electron is transferred from one atom. |
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16 | |
Sulfur and oxygen are both in the VIA family of the periodic table. If element X combines with oxygen to form the compound X2O, element X will combine with sulfur to form the compound |
| | A) | XS2. |
| | B) | X2S. |
| | C) | X2S2. |
| | D) | It is impossible to say without more information. |
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17 | |
One element is in the IA family of the periodic table, and a second is in the VIIA family.What type of compound will the two elements form? |
| | A) | ionic |
| | B) | covalent |
| | C) | They will not form a compound. |
| | D) | More information is needed to answer this question. |
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18 | |
One element is in the VA family of the periodic table, and a second is in the VIA family.What type of compound will these two elements form? |
| | A) | ionic |
| | B) | covalent |
| | C) | They will not form a compound. |
| | D) | More information is needed to answer this question. |
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19 | |
A covalent bond in which there is an unequal sharing of bonding electrons is a |
| | A) | single covalent bond. |
| | B) | double covalent bond. |
| | C) | triple covalent bond. |
| | D) | polar covalent bond. |
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20 | |
An inorganic compound made of only two different elements has a systematic name that always ends with the suffix |
| | A) | -ite. |
| | B) | -ate. |
| | C) | -ide. |
| | D) | -ous. |
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21 | |
Dihydrogen monoxide is the systematic name for a compound that has the common name of |
| | A) | laughing gas. |
| | B) | water. |
| | C) | smog. |
| | D) | rocket fuel. |
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