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"); document.writeln("Name: " + studentName + "
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Name: 
 

The Periodic Table



Modified True/False
Indicate whether the sentence or statement is true or false.  If false, change the identified word or phrase to make the sentence or statement true.
 

1. 

The central core of an atom is called the hub.  _______________

 

2. 

The chart showing the classifications of elements according to their properties and increasing atomic numbers is called the periodic table.  _______________

 

3. 

The mass of an electron is about equal to the mass of a proton.  _______________

 

4. 

Elements arranged in vertical columns in the periodic table are called periods.  _______________

 

5. 

The region around the nucleus occupied by the electrons is called the negative zone.  _______________

 

6. 

The symbol for chlorine is C.  _______________

 

7. 

The maximum number of electrons in the second energy level of an atom is 4.  _______________

 

8. 

Two isotopes of carbon are carbon-12 and carbon-14. These isotopes differ from one another by two protons.  _______________

 

9. 

Nonmetals are poor conductors of heat and electricity.  _______________

 

10. 

Seven electrons in the outermost energy level is characteristic of a metal.  _______________

 

11. 

The number of protons in an atom is called the atomic mass.  _______________

 

12. 

The sum of the number of protons and neutrons in an atom is the mass number.  _______________

 

13. 

The weighted average of the mass numbers of all the isotopes that occur in nature for a particular element is the average atomic number.  _______________

 

14. 

A very stable electron arrangement in the outer energy level is characteristic of noble gases.  _______________

 

15. 

Elements having three or fewer electrons in the outer energy level are classified as nonmetals.  _______________

 

16. 

The atomic masses of the elements are NOT whole number values because of the existence of quarks.  _______________

 

17. 

The identity of an element is determined by the number of protons.  _______________

 

18. 

According to present atomic theory, the location of an electron in an atom is best represented by a probability cloud.  _______________

 

19. 

Moving from left to right in a row of the periodic table, metallic properties increase.  _______________

 

Multiple Choice
Identify the letter of the choice that best completes the statement or answers the question.
 

20. 

Each inner energy level of an atom has maximum numbers of _____ it can hold.
a.
electrons
c.
quarks
b.
neutrons
d.
protons
 

21. 

Dot diagrams are used to represent _____.
a.
atomic numbers
b.
atomic mass
c.
isotopes
d.
outer electrons
e.
the structure of the nucleus
 

22. 

Particles of matter that make up protons and neutrons are _____.
a.
electrons
c.
quarks
b.
isotopes
d.
atoms
 

23. 

A chemical symbol represents the _____ of an element.
a.
name
b.
reaction
c.
group
d.
structure
e.
type
 

24. 

Horizontal rows of the periodic table are called _____.
a.
clusters
b.
families
c.
groups
d.
periods
e.
quarks
 

25. 

Atoms of the same element with different numbers of neutrons are called _____.
a.
isotopes
b.
metals
c.
metalloids
d.
radioactive
e.
transition elements
 

26. 

A particle that moves around the nucleus is _____.
a.
an electron
b.
an ion
c.
a neutron
d.
a quark
e.
a proton
 

27. 

Elements in Groups 3 through 12 of the periodic table are called _____.
a.
isotopes
b.
metalloids
c.
metals
d.
noble gases
e.
transition elements
 

28. 

A _____ is used to accelerate protons in the study of subatomic particles.
a.
teratron
c.
technology
b.
temanite
d.
television
 

29. 

A certain atom has 26 protons, 26 electrons, and 30 neutrons. Its mass number is _____.
a.
26
b.
30
c.
52
d.
56
e.
82
 



 
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