NAME: _______________________________________
Unit 3 Test Review
1. Arsenic (As), Selenium (Se), and Bromine (Br) are MOST similar in terms of?
Answer could be any of the following: atomic mass, electron energy levels,
same period, atomic number
2. Name an element on the periodic table that has similar CHEMICAL PROPERTIES to
Calcium. Answer could be any of the following: Magnesium, Beryllium,
Strontium, Barium, Radium
3. Where are the metals located on the periodic table? left of the zig-zag
4. Where are the non-metals located on the periodic table? right of the zig zag
5. Where are the metalloids located on the periodic table? On either side of the zigzag
6. Which has a higher atomic mass metals or non metals? metals
7. The valence electrons determine an elements chemical property and they also
determine how an element reacts with other elements.
8. What are the three main subatomic particles of an atom? protons, neutrons,
electrons
9. Which group on the periodic table is made of ONLY gases? group 18, noble gases
10. Which two groups on the periodic table are HIGHLY REACTIVE? group 1(alkali
metals) and group 17 (halogens)
11. Which group is not reactive AT ALL? group 18 (noble gases)
12. When looking at period 5, which group on the periodic table have the smallest
atomic number? group 1 (alkali metals)
13. Look at Fluorine, Neon, and Chlorine on your periodic table. Which two of those
three elements have the similar chemical properties? Fluorine and Chlorine
14. Look at Hydrogen, Lithium, and Beryllium on your periodic table. Which of the
following statements is TRUE...
a. Lithium is larger than Beryllium
b. Beryllium is more like Hydrogen than Lithium
c. Hydrogen has the same number of valence electrons as Lithium TRUE
d. Beryllium has fewer protons than Hydrogen
15. An atom that is HIGHLY reactive will have 1 or 7 valence electrons.
16. A stable atom that will not react has 8 valence electrons.
17. How is an element in group 1, period 4 similar to an element in group 5, period 4?
they have the same number of electron energy levels
NAME: _______________________________________
18. Below is an example of a Nitrogen atom.
Is it correct? YES
19. Below you need to draw Sodium, Oxygen, and Lithium. You must show the electron
levels, draw the number of electrons, protons, and neutrons. You need to use “+” for
protons, “-” for electrons, and “o” for neutrons.
20. How is an element in
group 1, period 3 similar to an element in group 1 period 5? they have the same
number of valence electrons
21. Have scientist been researching atoms for a long period of time? Yes or No YES
22. Who was the scientist that discovered that patterns appeared when elements were
arranged in order of increasing atomic mass? Dmitri Mendeleev
23. Define Metalloid: elements that are to the left and right of the zigzag line; have
some characteristics of metal and nonmetal
24. Define Metal: elements on the left side of the periodic table; have shiny
surfaces and are good conductors of electricity
25. Define Non-metal: elements on the right side of the periodic table; dull and are
not good conductors of electricity
26. There are ___7___ number of periods and they go from __left___ to __right___ on
the periodic table.
27. There are ___18___ number of groups and they go from ___top___ to
__bottom___ on the periodic table.
28. What does the periodic table predict? element properties
29. Elements in the same group have the same number of? valence electrons
30. Elements in the same period have the same number of? electron energy levels