Download Vocabulary Review

Unit 6: Properties of Matter
Chapter 18: Atoms and Elements
Name____________________________
Review Assignment
Vocabulary Review
Match the letter of the definition on the right with the term on the left. Write the letter in the
blank provided. There is one extra definition in each set.
Set One----------------------------------------------------------------------------------------------------------1. _____proton
a. particle with no charge that exists in the nucleus of most
atoms
2. _____neutron
b. negatively charge particle that exists in the nucleus of the
atom
3. _____electron
c. center of the atom, contains most of the atom’s mass
4. _____subatomic particle
d. negatively charged particle that exists in the space
surrounding at atom’s nucleus
5. _____nucleus
e. positively charged particle that exists in the nucleus of an
atom
f. tiny bits of matter that are the building blocks of an atom
Set Two----------------------------------------------------------------------------------------------------------1. _____group of elements
a. atoms of the same element which have different numbers of
neutrons in the nucleus
2. _____periodic table
b. a unit equal to one-twelfth of the mass of carbon-12
3. _____chemical symbol
c. elements with similar properties listed in a single column on
the periodic table
4. _____mass number
d. the total number of protons and neutrons in the nucleus of
the atom
5. _____isotope
e. a chart of the elements arranged to provide information
about each element’s behavior
6. _____atomic mass unit
f. the abbreviation for the name of an element
Set Three--------------------------------------------------------------------------------------------------------1. _____atomic number
a. an atom that has lost some of its electrons; an atom with
more protons than electrons
2. _____strong nuclear force
b. a way to refer to an element; describes the number of
protons in the nucleus
3. _____energy level
c. the reason that an atom’s protons don’t break its nucleus
apart
4. _____negative ion
d. an electron found in the highest energy level of an atom
5. _____positive ion
e. how electrons are arranged around an atom
6. _____valence electron
f. an atom that has gained extra electrons; an atom with more
electrons than protons
Set Four--------------------------------------------------------------------------------------------------------1. _____Ernest Rutherford
a. identified the electron using a cathode ray tube
2. _____James Chadwick
b. conducted experiments using cathode ray tubes
3. _____De Broglie, Schrodinger
c. theorized the existence of the nucleus
4. _____John Dalton
d. described electrons in moving around orbits around the
nucleus
5. _____Democritus
e. proposed the concept of the electron cloud
6. _____Niels Bohr
f. provided evidence to support the atomic theory
7. _____Rutherfor, Geiger, Marsden g. discovered the existence of the neutron
8. _____J. J. Thomson
h. proposed that matter is made up of small particles
9. _____Plucker, Crooks, Thomson
i. conducted the Gold Foil Experiment
Unit 6: Properties of Matter
Chapter 18: Atoms and Elements
Name____________________________
Review Assignment
Concept Review
1. Write the names (or groups of names) of the scientists in order of scientific contribution to
the understanding of modern atomic theory.
2. Draw a picture of an atom that has 5 protons, 5 neutrons, and 5 electrons. Label the charge
of each subatomic particle. What element is this?
3. Two atoms are placed next to each other. Atom A has 6 protons, 6 neutrons, and 5 electrons.
Atom B has 6 protons, 7 neutrons and 6 electrons. Respond to each of the following:
a. What is the mass number of Atom A?
b. What is the mass number of Atom B?
c. What is the atomic number of Atom A?
d. What is the atomic number of Atom B?
e. Give the element name and isotope notation of Atom A.
f. Give the element name and isotope notation of Atom B.
g. What word describes the relationship between these two atoms?
4. Why don’t the protons in the nucleus repel each other and break the atom apart?
5. Why do elements in the same column on the periodic table have similar properties?
6. Refer to the illustration below to answer the questions that follow.
Unit 6: Properties of Matter
Chapter 18: Atoms and Elements
a.
b.
c.
d.
e.
f.
g.
h.
i.
j.
k.
l.
Name____________________________
Review Assignment
Which atoms above are forms of the same element?
Are any of the atoms above ions? If so, which ones?
Are any of the atoms above isotopes? If so, which ones?
What is the atomic number of Atom A?
What is the mass number of Atom A?
What is the atomic number of Atom B?
What is the mass number of Atom B?
What is the atomic number of Atom C?
What is the mass number of Atom C?
Give the element name and isotope notation of Atom A.
Give the element name and isotope notation of Atom B.
Give the element name and isotope notation of Atom C.
7. Use the periodic table squares shown to answer the following.
a. What is the mass number of the most stable isotope of argon?
b. How many neutrons would this isotope have?
18
Ar
Argon
39.95
c. What is the mass number of the most stable isotope of krypton?
d. How many neutrons would this isotope have?
e. What is the mass number of the most stable isotope of nitrogen?
f. How many neutrons would this isotope have?