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Physical Science Midterm Review
Test Description: Midterm Review
Instructions: Answer all questions to get your test result.
1) Studying the effect of one thing on another in order to test a hypothesis is a(n)
A
experiment
B
exercise
C
constant
D
problem
2) How many meters are there in 1,865 cm?
A
1.865
B
18.65
C
186.5
D
0.1865
3) The variable plotted on the horizontal or x-axis is called the
A
dependent variable
B
independent variable
4) The process of gathering information through the senses is called
A
inference
B
observation
C
analysis
D
hypothesis
5) Why do the noble gases NOT form compounds readily?
A
They have empty outer energy levels
B
They have no electrons
C
They have seven electrons in the outer energy levels
D
Their outer energy levels are completely filled with electrons
6) A chemical bond that occurs when atoms share electrons is a(n) _____ bond.
A
metallic
B
magnetic
C
ionic
D
covalent
7) What is the name of the comound with the formula NaCl?
A
sodium chloride
B
sodium monocholoride
C
chlorine sodiate
D
sodium chlorate
8) How many electrons does an atom need to be stable?
A
8
B
4
C
2
D
6
9) What is a bond that forms when electrons are transferred from one atom to another?
A
atom
B
ionic
C
crystal
D
electron
10) What are the charged particle that form when atoms gain or lose electrons?
A
ions
B
atoms
C
bonds
D
valence electrons
11) What is the charge of an aluminum ion that has 13 protons and 10 electrons?
A
2+
B
3-
C
1+
D
3+
12) In Thomson's plum pudding model of the atom, the plums represent
A
electrons
B
protons
C
neutrons
D
atoms
13) An atom of gold with 79 protons, 79 electrons, and 118 neutrons would have a mass number of
A
276
B
197
C
158
D
39
14) The smallest particle into which an element can be divided and still be the same substance is called a(n)
A
electrons
B
atom
C
nucleus
D
neutron
15) Where are electrons likely to be found?
A
the nucleus
B
electron clouds
C
mixed throughout an atom
D
paths, or energy levels
16) If an isotope of uranium, uranium-235, has 92 protons, how many protons does uranium-238 have?
A
95
B
146
C
143
D
92
17) What particle did J.J. Thompson discover?
A
electron
B
atom
C
neutron
D
proton
18) Which statement about isotopes is true?
A
They have the same mass
B
They have a different atomic number
C
They have the same number of neutrons
D
They have the same number of protons
19) How many carbon atoms are in a molecule of glucose, C6H12O6?
A
3
B
24
C
12
D
6
20) In a solid, the particles
A
move independently of one another
B
vibrate in place
C
slide past one another
D
overcome the strong attraction between them
*select an answer for all questions
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