Chapter 10 Multiple Choice Quiz 1

Please answer all questions


1	Compared to metals, nonmetals are
		A)	more brittle as a solid.
		B)	better electrical conductors.
		C)	more ductile as a solid.
		D)	better conductors of heat.


2	Under ordinary, room temperature conditions, the greatest number of elements are
		A)	gases.
		B)	liquids.
		C)	metallic solids.
		D)	nonmetallic plasmas.


3	Carbon cannot be broken down into anything simpler by chemical means, so carbon must be
		A)	a heterogeneous mixture.
		B)	a homogeneous mixture.
		C)	an element.
		D)	a compound.


4	How many naturally occurring elements are found on the earth in significant quantities?
		A)	115
		B)	92
		C)	89
		D)	26


5	Isotopes are atoms of an element with identical chemical properties but with different
		A)	numbers of protons.
		B)	masses.
		C)	numbers of electrons.
		D)	atomic numbers.


6	The masses of all isotopes are based on a comparison to the mass of a particular isotope of
		A)	hydrogen.
		B)	carbon.
		C)	oxygen.
		D)	uranium.


7	The sum of the number of protons and neutrons in the nucleus of an atom is called the
		A)	atomic number.
		B)	atomic mass.
		C)	atomic weight.
		D)	mass number.


8	The weighted average of the masses of the stable isotopes of an element as they occur in nature is called the
		A)	atomic number.
		B)	atomic mass.
		C)	atomic weight.
		D)	mass number.


9	The modern periodic law is based on
		A)	atomic number.
		B)	atomic mass.
		C)	atomic weight.
		D)	chemical activity.


10	Each family, or group of elements in a vertical column of the periodic table has elements with chemical characteristics that are
		A)	exactly the same.
		B)	similar.
		C)	different.
		D)	exactly opposite.

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