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Unit 3/4 Review
Test Description: 8th Science
Instructions: Answer all questions to get your test result.
1) Which of the following is not found in the nucleus?
A
Atomic mass
B
Electrons
C
Protons
D
Neutrons
2) Inside the nucleus, what is the atomic number represented?
A
Electron cloud
B
Electrons
C
Protons
D
Neutrons
3) What would help when finding the charge of an atom's nucleus?
A
Physical properties
B
The symbol
C
Chemical Reactivity
D
Mass number
4) What subatomic particle SURROUNDS the nucleus?
A
All of the above
B
Electrons
C
Protons
D
Neutrons
5) Which is the best representation of electrical charges?
A
+Protons, 0 Neutrons, -Electrons
B
-Protons, 0 Neutrons, -Electrons
C
+Protons, +Neutrons, -Electrons
D
+Protons, +Neutrons, +Electrons
6) What is the best way to identify a Beryllium atom?
A
Has no mass
B
Mass is 1/2000 amu
C
Has 4 protons
D
Has no nucleus
7) The most reactive metal would be the one...
A
with 5 valence elctrons
B
with 7 valence electrons
C
with 2 valence electrons
D
with zero valence electrons
8) Protons in one atom in any element is
A
found at the bottom
B
the same as the atomic number
C
found in the electron cloud
D
found on the side
9) The elements Phosphorus, Arsenic and Bismuth are all in the same...
A
period because of the same valence electrons
B
period because they have same orbitals
C
Electron cloud
D
group because of the same orbitals
10) How are the elements Nb, Co and Sc organized?
A
Co and Sc are in the same group
B
Nb and Co are in the same cloud
C
Nb and Co are in the same group
D
Co and Sc are in the same period
11) Which group on the periodic table is the most stable and considered noble gases?
A
Group 17
B
Group 1
C
Group 6
D
Group 18
12) Which of the following could be a trend or pattern on the Periodic Table?
A
atomic number and atomic mass stay the same in both the periods and the groups
B
atomic number and atomic mass decrease from left to right in a period, along with the groups
C
atomic number and atomic mass increase from left to right in a period, and orbitals stay the same in each group
D
atomic number and atomic mass increase from left to right in a period and orbital levels increase from top to bottom in a gr
13) What kind of properties would the element copper have?
A
low conductivity , high malleability, low luster
B
low conductivity, low malleability, low luster
C
high conductivity, high malleability, high luster
D
high conductivity, low malleability, low luster
14) An 8th gr student examines an object that is pale, brittle and dull: what could the object be?
A
a gas
B
a metalloid
C
a metal
D
a nonmetal
15) A NONMETAL would have the following properties -
A
brittle, shiny, good conductor
B
dull, malleable, good insulator
C
dull, brittle, good insulator
D
dull, malleable, good conductor
16) What kind of a solid would you use to make into thin wire to create a cell phone?
A
Metal
B
Nonmetal
C
Metalloid
D
Noble gas
17) Why is aluminum and copper good for cooking and electricity?
A
Nonmetals are good insulators
B
Metals are good conductors
C
Metalloids are good gases
D
Nonmetals are good conductors
18) Using the formula D=m/v, solve for D=16.7 mass/4.4 volume to the nearest tenth
A
2.2
B
8.3
C
3.0
D
3.8
19) If you had a volume of liquid of 35 and and the mass of the liquid 105 grams - what is the Density
A
D=105/35=30
B
D=105/105=0
C
D=35/100=350
D
D=35/105=3.0
20) If an object weighed a mass of 37.5g and then put into a liquid with a volume of 10/mL what is the Density?
A
307
B
375
C
3.75
D
30
*select an answer for all questions
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