Introduction to the Periodic Table
Practice Test
1.
This atom is the standard for atomic masses.
a.
carbon-12
b.
uranium-238
c.
oxygen-16
d.
aluminum-27
2.
When water decomposes into hydrogen and oxygen, the mass _____________.
a.
remains constant
b.
increases
c.
decreases
d.
decreases if the temperature exceeds 100oC.
3.
In natural waste-disposal processes, atoms are ___________.
a.
destroyed
b.
recycled
c.
created
d.
made into aluminum
4.
What is the Group number of the alkali metals?
a.
3
b.
4
c.
1
d.
2
5.
What group of elements was unknown to Mendeleev when he first organized his periodic table?
a.
Group 1, the alkali metals
b.
Group 18, the noble gases
c.
the transition elements
d.
Group 2, the alkaline earth metals
6.
The properties of the chemical elements in the periodic table occur in ______________.
a.
descending sequence
b.
do discernable pattern
c.
ascending sequence
d.
repeating patterns
7.
A thinking device that helps you understand and explain macroscopic observations is called a/an ______________.
a.
prediction
b.
scientific model
c.
observation
d.
experiment
8.
This isotope is often used to date prehistoric fossils.
a.
uranium-235
b.
carbon-14
c.
oxygen-16
d.
calcium-40
9.
A substance must be ___________________.
a.
a heterogeneous mixture
b.
a homogeneous mixture
c.
an element
d.
an element or a compound
10.
A substance being dissolved is called ____________.
a.
a solvent
b.
a solute
c.
an aqueous solvent
d.
a solution
11.
An exothermic reaction is one that _______________.
a.
absorbs energy
b.
produces a solid
c.
causes a color change
d.
gives off energy
12.
The nucleus of this atom contains nine protons and nine neutrons.
a.
fluorine-18
b.
nitrogen-19
c.
neon-18
d.
oxygen-18
13.
Photosynthesis is _______________.
a.
a physical change
b.
exothermic
c.
endothermic
d.
a substance
14.
A hypothesis is more likely to become a __________ because __________.
a.
theory, fewer experiments are needed in order to support it
b.
scientific law; theories are conclusions reached by many scientists about relationships in nature
c.
theory, scientific laws are conclusions reached by many scientists about relationships in nature
d.
scientific law; fewer trials are needed during the experimental phase
15.
n- and p-type semiconductors may be combined to form _____________.
a.
vacuum tubes
b.
cathode-ray tubes
c.
transistors
d.
diodes
16.
Which pair of elements would you expect to have similar properties?
a.
Si and Ge
b.
Mg and Ti
c.
F and Ne
d.
Li and Fe
17.
The weighted average mass of all of an element's naturally occurring isotopes is the element's ________________.
a.
atomic mass
b.
mass number
c.
atomic number
d.
symbol
18.
These elements have six electrons in their outermost energy levels.
a.
O, S, and Se
b.
Cr, Mn, and Fe
c.
He, Ne, and Ar
d.
Cr, Mo, and W
