Formation of Compounds
Practice Test
1.
This substance decomposes to produce carbon, hydrogen, and oxygen. It may be ______________.
a.
table salt
b.
bronze
c.
sucrose
d.
ammonia
2.
The statement that the physical and chemical properties of the elements repeat in a regular pattern when they are arranged in order of increasing atomic number is known as the ______________.
a.
Dobereiner's hypothesis
b.
periodic law
c.
Group theory
d.
Mendeleev theory
3.
Except for helium, this expresses the stability of a noble-gas atom's filled s and p sublevels.
a.
the duet rule
b.
the trio rule
c.
the octet rule
d.
the sextet rule
4.
The color of a substance is called a __________.
a.
chemical property
b.
physical change
c.
physical property
d.
chemical change
5.
Carbon dioxide is __________ in water.
a.
insoluble
b.
blue
c.
a solid
d.
soluble
6.
A substance must be ___________________.
a.
a homogeneous mixture
b.
a heterogeneous mixture
c.
an element or a compound
d.
an element
7.
Mendeleev saw that properties of the elements repeated in an orderly way when he organized them according to ______________.
a.
increasing atomic size
b.
decreasing atomic number
c.
increasing atomic mass
d.
increasing volume
8.
How many single and double covalent bonds does a carbon atom have in a carbon dioxide molecule?
a.
four single bonds
b.
one double bond and two single bonds
c.
two double bonds
d.
two triple bonds
9.
Which of the results of Rutherford's gold foil experiments was not consistent with the plum pudding atomic model?
a.
Most of the alpha particles passed straight through the gold foil.
b.
Some alpha particles were deflected straight back toward the particle source.
c.
The zinc sulfide coated screen produced a flash of light whenever it was struck by an alpha particle.
d.
The paths of alpha particles were only slightly altered by collisions with electrons.
10.
Sterling silver is _____________.
a.
a compound
b.
a heterogeneous mixture
c.
an alloy
d.
an element
11.
An atom's valence electrons are those in its ___________.
a.
lowest energy level
b.
outermost energy level
c.
electron clouds
d.
inner energy levels
12.
This isotope is often used to date prehistoric fossils.
a.
calcium-40
b.
uranium-235
c.
oxygen-16
d.
carbon-14
13.
These elements have six electrons in their outermost energy levels.
a.
Cr, Mn, and Fe
b.
O, S, and Se
c.
Cr, Mo, and W
d.
He, Ne, and Ar
14.
This compound is commonly found in all three states of matter on Earth's surface.
a.
carbon dioxide
b.
sodium chloride
c.
water
d.
iron oxide
15.
_________ is credited with formulating the modern atomic theory of matter, which has remained essentially intact up to the present time.
a.
Dalton
b.
Lavoisier
c.
Proust
d.
Archimedes
16.
From beryllium to radium, you would expect the chemical reactivities of the elements in Group 2 to ____________.
a.
increase
b.
remain the same
c.
increase, then decrease
d.
decrease
