Chemistry of Compounds

Chemistry of Compounds
PHYSICAL SCIENCE EOC REVIEW Nature of Matter Elements Compounds & Mixtures Structure of Matter Chemistry of Elements Chemistry of Compounds Reactions

EOC REVIEW NATURE OF MATTER
Any substance that has mass and occupies space is called A solid B matter C liquid D gas ANSWER: B

The physical state of matter that has both definite shape and definite volume is A solid B matter C liquid D gas ANSWER: A

The physical state of matter that has a definite volume but no definite shape is A solid B matter C liquid D gas ANSWER: C

The physical state of matter that has no definite volume nor definite shape is A solid B matter C liquid D gas ANSWER: D

The amount of matter in an object is best expressed by its A volume B density C weight D mass ANSWER: D

The force of gravity on an object is called A mass B volume C density D weight ANSWER: D

When a substance changes and still retains its original properties, the change is called A chemical B exothermic C endothermic D physical ANSWER: D

Which of the following is not a necessary characteristic of a chemical change? A a change in composition B release of energy C absorption of energy D a change in state ANSWER: D

EOC REVIEW COMPOSITION OF MATTER
Substances that cannot be decomposed to any simpler substances are called A elements B compounds C mixtures D none of these ANSWER: A

Iron, sodium, copper, and silver are examples of A metals B metalloids C nonmetals D compounds ANSWER: A

Metals that reflect light are said to possess the property of A malleability B ductility C conductivity D luster ANSWER: D

Metals that can be hammered into thin sheets are said to possess the property of A ductility B malleability C luster D conductivity ANSWER: B

The chemical symbol for potassium is A P B Po C K D Pt ANSWER: C

The horizontal rows in the Periodic Table of Elements are known as A families B groups C nonmetals D periods ANSWER: D

The vertical rows in the Periodic Table of Elements are known as A metals B groups C nonmetals D periods ANSWER: B

Compounds consist of two or more elements A combined in definite proportions B mixed together C combined in varying proportions D combined physically ANSWER: A

The number of atoms of oxygen in the formula C6H12O6 is A 4 B 6 C 12 D 24 ANSWER: B

EOC REVIEW STRUCTURE OF MATTER
The tiny, negatively charged particles first described by JJ Thomson are called A nucleus B protons C electrons D neutrons ANSWER: C

The attraction of a rubbed comb for paper gives evidence that A matter is electrical in nature B matter is is magnetic C matter contains protons D matter is electrically neutral ANSWER: A

When two similarly charged objects are brought close together, they A attract each other B have no effect on each other C stick to each other D repel each other ANSWER: D

An object becomes positively charged when it A has an excess of electrons B loses electrons C has an equal number of protons and neutrons D has an equal number of protons and electrons ANSWER: B

The “plum pudding” model of the atom was proposed by A Rutherford B Democritus C Thomson D Bohr ANSWER: C

The central portion of an atom is called the A nucleus B shell C electron D ring ANSWER: A

In a neutral atom, the number of electrons is A equal to the number of neutrons B greater than the number of protons C less than the number of protons D equal to the number of protons ANSWER: D

Atoms of the same element that differ slightly in mass are called A neutrons B ions C isotopes D positrons ANSWER: C

The differences in the mass of atoms of the same element are attributed to different numbers of A protons B neutrons C electrons D positrons ANSWER: B

The atomic number of an element indicates A the number of protons B the number of electrons C the number of protons and neutrons D the number of neutrons ANSWER: A

The atomic mass of an atom is equal to the mass of the A protons B protons and neutrons C neutrons D electrons ANSWER: B

The maximum number of electrons found in the first level of any atom is A 2 B 8 C 16 D 18 ANSWER: A

In the atom Na, the number of protons is A 12 B 23 C 11 D 34 ANSWER: C

Of the following, the element that has an outermost level that is complete is A sodium B neon C chlorine D oxygen ANSWER: B

To achieve stability when it combines with chlorine, a sodium atom will A accept 1 electron B accept 7 electrons C donate 1 electron D donate 7 electrons ANSWER: C

An element that has fewer than 2 electrons in its first energy level is A neon B hydrogen C oxygen D fluorine ANSWER: B

The symbol X-2 represents A an atom B a molecule C an ion D an electron ANSWER: C

EOC REVIEW CHEMISTRY OF ELEMENTS
When metals react chemically, they A gain electrons B lose electrons C gain protons D lose protons ANSWER: B

When elements with four electrons in their outermost level react chemically, they A always gain 4 electrons B always lose 4 electrons C may lose, gain, or share 4 electrons D may lose or gain 4 electrons ANSWER: C

As we move from left to right across a period in the Periodic Table, metallic activity A decreases B increases C remains the same D increases, then decreases ANSWER: A

In the Periodic Table, the elements that exhibits the strongest nonmetallic properties is found A on the upper left side B on the lower left side C on the upper right side D on the lower right side ANSWER: C

In the outermost electron level of most metalloids, the number of electrons is A 8 B 4 C 2 D 6 ANSWER: B

In any group of metals in the Periodic Table, the most active metal in the group is found A at the top B in the middle C at the bottom D in different places depending on the group ANSWER: C

Potassium is more reactive than sodium and both metals are found in the same group. The atomic radius of potassium is A larger than that of sodium B the same as that of sodium C smaller than that of sodium D variable ANSWER: A

The most active nonmetal in a group is found A at the bottom B at the top C in the middle D in different places depending on the group ANSWER: B

The oxidation state of aluminum is +3. This means that, in a chemical reaction, aluminum is most likely to A gain 5 electrons B gain 3 electrons C give away 5 electrons D give away 3 electrons ANSWER: D

As the size of an atom of a nonmetal decreases, electrons are A lost more easily B lost with greater difficulty C attracted more easily D attracted with greater difficulty ANSWER: C

Of the following, the metal that exhibits more than one valence number is A sodium B potassium C calcium D iron ANSWER: D

Of the following nonmetals, the element that does not exhibit more than one valence electron number is A fluorine B sulfur C carbon D nitrogen ANSWER: A

In the compound FeO, iron has an oxidation number of A -2 B +2 C +3 D -3 ANSWER: B

EOC REVIEW CHEMISTRY OF COMPOUNDS
To indicate the number of atoms of an element in a compound, you use A a subscript to the right of the symbol B an exponent to the right of the symbol C a subscript to the left of the symbol D an exponent to the left of the symbol ANSWER: A

In the formula (NH4)2SO4, the number of atoms of sulfur present is A 4 B 8 C 2 D 1 ANSWER: D

When using the “crisscross” method for writing formulas, the oxidation state of the nonmetal A precedes the symbol for the metal B follows the symbol for the metal C follows the symbol for the nonmetal D neither precedes nor follows the symbol for the metal ANSWER: B

When writing a chemical formula, the symbol for the element with a positive oxidation state A is written last B needs no subscript C is written first D is placed in parentheses ANSWER: C

The formula for the compound formed when Al+3 combines with S-2 is A Al3S2 B AlS C AlS3 D Al2S3 ANSWER: D

The compound whose formula is ZnS is named A zinc sulfate B zinc sulfite C zinc sulfide D zinc and sulfur ANSWER: C

The compound whose formula is Ca(OH)2 is named A calcium oxygen hydride B calcium hydroxide C carbon hydrogen oxide D calcium oxide ANSWER: B

The total number of atoms present in one molecule of (NH4)2CO3 is A 12 B 10 C 9 D 14 ANSWER: D

When an atom of aluminum with a valence of +3 unites to form a compound, it A donates 3 electrons B accepts 3 electrons C donates 5 electrons D accepts 5 electrons ANSWER: A

EOC REVIEW REACTIONS A chemical equation describes
A only the reactants B only the products C neither the reactants nor the products D both the reactants and the products ANSWER: D

EOC REVIEW REACTIONS In a chemical reaction, the total mass of the reactants A is greater than the total mass of the products B is equal to the total mass of the products C is less than the total mass of the products D cannot be determined ANSWER: B

EOC REVIEW REACTIONS To satisfy the law of conservation of matter, an equation A must first be written in words B should show the atomic masses of the reactants and products C must be balanced D must indicate the physical state of each of the reactants and products ANSWER: C

To balance an equation, you use A exponents B subscripts
EOC REVIEW REACTIONS To balance an equation, you use A exponents B subscripts C superscripts D coefficents ANSWER: D

The number of atoms of oxygen present in 2Al(NO3)3 is A 18 B 6 C 9 D 8
EOC REVIEW REACTIONS The number of atoms of oxygen present in 2Al(NO3)3 is A 18 B 6 C 9 D 8 ANSWER: A

In a synthesis reaction, A two metals change places
EOC REVIEW REACTIONS In a synthesis reaction, A two metals change places B two or more elements form a single compound C a compound is broken down D heat energy is not released ANSWER: B

Chemistry of Compounds

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