Unit 5 Exam - Craig Fisher | Library

 Answer the questions by clicking on the correct answer. You will have ONE class period in which to complete this exam. 

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What occurs between atoms that do not easily lose electrons?

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What can group numbers on the periodic table help you determine?

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What do atoms gain, lose or share when they bond?

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How many valence electrons does helium need to have a full valence level?

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What is a bond that forms when electrons are transferred from one atom to another?

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What are the charged particles that form when atoms gain or lose electrons?

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What does a sodium atom become when it loses its only valence electron?

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What is the charge of an aluminum ion that has 13 protons and 10 electrons?

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If the ending -ide is added to the name of an ion, what do we know about the ion?

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What is the name of the three dimensional pattern that forms when ions bond?

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Most molecules are composed of what?

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Why can metals bend without breaking?

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How are electrons in an atom organized?

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What are the only parts of an atom that make chemical bonds?

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What is the same within each group on the periodic table?

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Why don't noble gases normally form chemical bonds?

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What is the charge of a sodium ion with 11 protons and 10 electrons?

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The more easily an atom gains an electron, what does it release more of?

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What is the smallest particle into which a covalently bonded compound can be divided and still be the same compound?

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What are the elements found in nature as diatomic molecules called?

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Which of the following is NOT an example of a diatomic element?

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What allows metals to bond?

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Which of the following properties of a metal means that it can be drawn into wires?

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Which of the following represents the number of protons in an atom?

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How many electrons fill the valence level of an atom?

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Which of the following statements describes a chemical change?

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Which of the following is NOT a sign of a chemical reaction?

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Which of the following occurs when water freezes?

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What is the force that holds two atoms together called?

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What causes chemical bonds in molecules to break?

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How do substances form during a chemical reaction?

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A calcium carbonate molecule has 1 calcium (Ca) atom, 3 oxygen (O) atoms, and 1 carbon (C) atom. Which of the following shows the chemical formula for calcium carbonate?

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The chemical symbol for iron is Fe. The chemical symbol for oxygen is O. The formula for iron oxide, a type of rust, is Fe2O3. How many iron atoms are in one molecule of iron oxide?

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What is the charge of an ionic compound?

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Which of the following is the product in the chemical formula N + O2------> NO2?

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Which of the following uses coefficients correctly to balance the equation N2 + H2------> NH3?

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Which of the following states the law of conservation of mass?

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Nitrogen dioxide is a covalent compound. How many oxygen atoms are in a nitrogen dioxide molecule?

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How many oxygen atoms are present on the reactant side of the chemical equation 4Fe + 3O2 ------> 2Fe2O3?

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Which of the following equations shows a double displacement reaction?

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In a single displacement reaction,

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An ion is

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Which of the following will NOT increase the rate of a chemical reaction?

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Which of the following chemical equations shows an endothermic reaction?

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Which of the following is NOT an example of a chemical reaction?

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Which of the following is an example of a diatomic molecule?

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Which of the following phrases describes a catalyst?

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How many atoms are represented in the formula CaCO3

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If a chemical symbol in a chemical formula has no subscript, it means

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Which of the following is the chemical formula for a dinitrogen trioxide molecule?

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If it is brittle, dissolves easily in water, has a high melting point and conducts electric current, it is a(n)

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Which compound has the weaker chemical bond?

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When a metal reacts with a nonmetal it makes

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Most covalent compounds

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Sugar is a covalent compound that dissolves in water but does not form ions, so it

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Covalent compounds have

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What substances can acids react with to produce hydrogen gas?

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Acids conduct electric current by forming

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Acids have a

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Bases have a

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When a base is added to red litmus paper, the indicator turns

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If a cleaning product includes ammonia as an ingredient, it probably is made from a(n)

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When all the molecules of an acid break apart in water, the solution is called a

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Citric acid is a weak acid, so only a few molecules would break apart when

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When acids and bases come in contact with each other, they

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One way to test pH is to use a strip of paper that has several

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A neutral solution has a pH of

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Sodium chloride, sodium nitrate and calcium sulfate are all

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How many atoms can a carbon atom make bonds with?

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Which hydrocarbon contains only single bonds between carbon atoms?

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Carbohydrates, lipids, proteins and nucleic acids are all

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What are aromatic hydrocarbons based on?

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Brittleness and a high melting point are two properties of

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When an acid and a base neutralize each other, what remains?

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Over 90% of all compounds are of what type?

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