Review Section 1.3

1)An element that is a very reactive gas is most likely a member of thea) 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 elementsc)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 nonmetalsd)elements are arranged by increasing atomic number

4)A property of nonmetals is that they area)shiny b)poor conductors c)are malleable and ductiled)all are solids at room temperature

5)Which is not found on the periodic tablea) the atomic number of an element b) the symbol of an elementc) the atomic mass of an element d) the density of an element

6) When a sulfur atom gains two electrons, it becomesa) a cation b) a +2 ion c) a -2 ion d) a -6 ion

7)Al +3 (aluminum ion) is an atom that hasa)3 fewer electrons than protons b)3 fewer neutrons than electronsc)3 more protons than electrons d)none of the above

8) Elements in group 17 generally for ions with _____ chargea) +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 atomsd) the way chemical formulas are written

2.- What is a chemical formula?a) symbols that represent the elements in a compoundb) subscripts that tell the number of each atom in a compoundc) symbols and subscripts that tell the type of bond between atomsd) 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 propertiesc) the same compound with different propertiesd) none

4.- Compounds often have different properties from those of thea) electrons that make up the compoundb) elements that make up the compoundc) protons that make up the compound

d) crystals that make up the compound

5.- Different compounds can be composed ofa) the same elements in different ratios b) the same elements in the same ratioc) 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 meansa) element b) compound c) mixture d) none

4.- Which of the following statements is falsea) A compound is a substance made of 2 or more elements bonded togetherb) An element cannot be broken down by ordinary chemical meansc) A mixture cannot be separated by physical meansd) 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 calleda) atom b) molecule c) ion d) none

8.- When 2 or more substances are mixed but not chemically combined they form aa) compound b) element c) mixture d) none

9.- The following model represents an Element ,a mixture or a compound?

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