Earth Science: Geology, the Environment, and the Universe

Section 1: What are elements?

What are elements?

1
According to the symbols shown in the figure, in which state of matter do these elements occur?
<a onClick="window.open('/olcweb/cgi/pluginpop.cgi?it=jpg::::/sites/dl/free/0078664233/184123/16_pertab_ca_032c.jpg','popWin', 'width=NaN,height=NaN,resizable,scrollbars');" href="#"><img valign="absmiddle" height="16" width="16" border="0" src="/olcweb/styles/shared/linkicons/image.gif"> (13.0K)</a>
A)plasma
B)solid
C)liquid
D)gas
2
Isotopes have the same number of __________ but different numbers of __________.
A)neutrons, protons
B)neutrons, electrons
C)protons, neutrons
D)electrons, protons
3
What is a substance that cannot be broken down into simpler substances with all the characteristics of the substance?
A)a solid
B)matter
C)a gas
D)an element
4
What do the nuclei of some isotopes release during radioactive decay?
A)valence electrons
B)lead
C)their nuclei
D)radiation
5
What determines the chemical behavior of an element?
A)its isotopes
B)the valence electrons
C)the size of the nucleus
D)the number of energy levels
6
What is the smallest particle of an element?
A)a neutron
B)an atom
C)an isotope
D)a proton
7
What particle(s) make up the nucleus of an atom?
A)electrons only
B)neutrons and electrons
C)protons and neutrons
D)protons only
8
What type of atomic particle has a negative charge?
A)a neutron
B)a proton
C)an electron
D)an isotope
9
The number of protons in an atom's nucleus is the __________.
A)radioactivity number
B)isotopic number
C)atomic number
D)mass number
10
Electrons tend to occupy the __________ energy level.
A)highest available
B)intermediate
C)second
D)lowest available
Glencoe Online Learning CenterScience HomeProduct InfoSite MapContact Us

The McGraw-Hill CompaniesGlencoe

Please read our Terms of Use and Privacy Policy before you explore our Web site. To report a technical problem with this Web site, please contact the Web Producer.