141.
Periodic describes
A
something that occurs at regular intervals.
B
something that occurs very rarely.
C
something that occurs frequently.
D
something that occurs three or four times a year.
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Periodic describes
something that occurs at regular intervals.
something that occurs very rarely.
something that occurs frequently.
something that occurs three or four times a year.
Most metals are
solid at room temperature.
bad conductors of electric current.
dull.
not malleable.
Every atom of a given element has the same number of
protons.
neutrons.
electrons.
isotopes.
How do the physical and chemical properties of the elements change?
periodically within a group
periodically across each period
periodically within a family
periodically across each group
The elements in each vertical column on the periodic table usually have similar properties and are called a(n)
period.
group.
element.
property.
The smallest particle into which an element can be divided and still have the properties of that element is called a(n)
nucleus.
electron.
atom.
neutron.
Which of the following has the least mass in an atom?
neutron
electron
nucleus
proton
Most of the elements in the periodic table are
gases.
nonmetals.
metals.
metalloids.
Elements lying along the zigzag line on a periodic table are
metalloids
noble gases
metals
nonmetals
The elements to the right of the zigzag line on the periodic table are called
metals.
nonmetals.
metalloids.
conductors.
Elements on the periodic table are arranged in order of
increasing atomic number.
decreasing atomic number.
increasing density.
decreasing density.
Where are electrons likely to be found?
mixed throughout an atom
in definite paths
in the nucleus
in electron clouds
A horizontal row on the periodic table is called a(n)
period.
atomic number.
group.
family.
Transition metals are
not good conductors of electric current.
used to make aluminum.
good conductors of thermal energy.
more reactive than alkali metals.
What is the meaning of the word atom?
hard particles
not able to be divided
dividable
invisible
The carbon group has two metalloids, both of which are used to make
cans.
computer chips.
dinnerware.
foil.
How would you describe the nucleus?
tiny, negatively charged
dense, negatively charged
dense, positively charged
mostly empty space, positively charged
The number at the top is the
atomic mass.
chemical symbol.
atomic number.
element name.
The properties of elements in a horizontal row of the periodic table follow
no pattern.
an unpredictable pattern.
a nonrepeating pattern.
a periodic pattern.
If an isotope of uranium, uranium-235, has 92 protons, how many protons does the isotope uranium-238 have?
143
146
92
95