Review Section 1.3

1)An element that is a very reactive gas is most likely a member of the
a) noble gases                ...
d) crystals that make up the compound

5.- Different compounds can be composed of
a) the same elements in different ratios...
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Quiz Balancing Chemical Equations 2

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Quiz Balancing Chemical Equations 2

  1. 1. Review Section 1.3 1)An element that is a very reactive gas is most likely a member of the a) noble gases b) alkali metals c) halogens d) actinides 2)Which statement is true? a)alkali metals should be stored under water b)alkali metals are group 2 elements c)alkali metals react with elements of group 18 d) alkali metals are very reactive 3)Which statement about the periodic table is false? a)there are more metals than nonmetals b)the metalloids are located between metals and nonmetals c)the elements at the far left f the P.T. are nonmetals d)elements are arranged by increasing atomic number 4)A property of nonmetals is that they are a)shiny b)poor conductors c)are malleable and ductile d)all are solids at room temperature 5)Which is not found on the periodic table a) the atomic number of an element b) the symbol of an element c) the atomic mass of an element d) the density of an element 6) When a sulfur atom gains two electrons, it becomes a) a cation b) a +2 ion c) a -2 ion d) a -6 ion 7)Al +3 (aluminum ion) is an atom that has a)3 fewer electrons than protons b)3 fewer neutrons than electrons c)3 more protons than electrons d)none of the above 8) Elements in group 17 generally for ions with _____ charge a) +7 b) +1 c) -7 d) -1 Review Section 2.1 1.- The properties of compounds depend on: a) the neutrons in the atoms b) the elements that make them and how they are combined(ratio) c) the number of atoms d) the way chemical formulas are written 2.- What is a chemical formula? a) symbols that represent the elements in a compound b) subscripts that tell the number of each atom in a compound c) symbols and subscripts that tell the type of bond between atoms d) symbols and subscripts that tell the type and ratio of atoms in a compound 3.- The same elements can form : a) different compounds with different properties b) different compounds with the same properties c) the same compound with different properties d) none 4.- Compounds often have different properties from those of the a) electrons that make up the compound b) elements that make up the compound c) protons that make up the compound
  2. 2. d) crystals that make up the compound 5.- Different compounds can be composed of a) the same elements in different ratios b) the same elements in the same ratio c) no more than two elements d) only one element Review Elements, Compounds, Mixtures 1.- Type of matter made of only one type of atom is : a) element b) compound c) mixture d) molecule 2.- Smallest unit of an element : a) atom b) molecule c) mixture d) all 3.- Type of matter that cannot be broken down by ordinary chemical means a) element b) compound c) mixture d) none 4.- Which of the following statements is false a) A compound is a substance made of 2 or more elements bonded together b) An element cannot be broken down by ordinary chemical means c) A mixture cannot be separated by physical means d) A compound can be separated by chemical reactions 5.- The following are forms of matter except: a) elements b) compounds c) energy d) mixtures 6.- Which of the following is a compound? a) alcohol b) salty water c) gold d) hydrogen 7.- The smallest unit of a compound is called a) atom b) molecule c) ion d) none 8.- When 2 or more substances are mixed but not chemically combined they form a a) compound b) element c) mixture d) none 9.- The following model represents an Element ,a mixture or a compound? _____________ ______________

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