Chapter 2:
Matter is Made up of Atoms
Practice Test
1.
An element's emission spectrum is thought to be produced when electrons move from _____________.
a.
inside the atom to outside the atom
b.
higher to lower energy levels
c.
lower to higher energy levels
d.
the nucleus to energy levels
Hint
2.
Lavoisier came to the conclusion that air is a mixture made up mostly of these two gases.
a.
oxygen and carbon dioxide
b.
hydrogen and oxygen
c.
oxygen and methane
d.
nitrogen and oxygen
Hint
3.
This subatomic particle has a mass of 1.01 u and a charge of zero.
a.
proton
b.
positron
c.
electron
d.
neutron
Hint
4.
The distance between corresponding points on two consecutive waves is called _____________.
a.
wavelength
b.
amplitude
c.
speed
d.
frequency
Hint
5.
This color of light has the highest frequency of the visible electomagnetic spectrum.
a.
red
b.
green
c.
violet
d.
blue
Hint
6.
Ne-21 is an _____________ of neon.
a.
allotrope
b.
atomic mass
c.
atomic number
d.
isotope
Hint
7.
This atom is the standard for atomic masses.
a.
carbon-12
b.
uranium-238
c.
aluminum-27
d.
oxygen-16
Hint
8.
When an atom absorbs energy that causes one of its electrons to move to a higher energy level, the atom is said to be in _____________.
a.
an outer orbit
b.
the ground state
c.
the nucleus
d.
an excited state
Hint
9.
These two particles are found in atomic nuclei.
a.
protons and neutrons
b.
protons and electrons
c.
protons and gamma rays
d.
neutrons and electrons
Hint
10.
The number of protons in the nucleus of the atoms of an element determines the element's _____________.
a.
gender
b.
atomic number
c.
mass number
d.
atomic mass
Hint
11.
This isotope is often used to date prehistoric fossils.
a.
oxygen-16
b.
uranium-235
c.
carbon-14
d.
calcium-40
Hint
12.
Greek philosophers thought these four elements formed all matter.
a.
earth, sea, air, plasma
b.
carbon, phosphorus, calcium, oxygen
c.
earth, air, fire, water
d.
hydrogen, oxygen, carbon, nitrogen
Hint
13.
A magnesium atom has _______ valence electron.
a.
four
b.
two
c.
three
d.
five
Hint
14.
The weighted average mass of all of an element's naturally occurring isotopes is the element's ________________.
a.
mass number
b.
atomic number
c.
atomic mass
d.
symbol
Hint
15.
__________ is credited with formulating the modern atomic theory of matter, which has remained essentially intact up to the present time.
a. Proust
b. Archimedes
c. Lavoisier
d. Dalton
Hint
16.
This element is in period two of the periodic table and has four dots in its Lewis dot diagram.
a.
carbon
b.
beryllium
c.
oxygen
d.
neon
Hint
17.
Rutherford's gold-foil experiment showed that the atomic nucleus is ________________.
a.
small, dense, and positive
b.
large, light, and positive
c.
small and negative
d.
large
Hint
18.
The nucleus of this atom contains nine protons and nine neutrons.
a.
neon-18
b.
fluorine-18
c.
oxygen-18
d.
nitrogen-19
Hint
19.
Most alpha particles in Rutherford's gold-foil experiment ________________________.
a.
bounced back
b.
were deflected at large angles
c.
passed straight through the foil
d.
were deflected at small angles
Hint
20.
When 0.243 g of magnesium reacts with 0.160 g of oxygen, how many grams of magnesium oxide is produced?
a.
0.486 g
b.
0.243 g
c.
less than 0.403 g
d.
0.403 g
Hint
