Physical Science Midterm Review Question Preview (ID: 40337)
Midterm Review.
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Studying the effect of one thing on another in order to test a hypothesis is a(n)
a) exercise
b) experiment
c) constant
d) problem
How many meters are there in 1,865 cm?
a) 0.1865
b) 1.865
c) 18.65
d) 186.5
The variable plotted on the horizontal or x-axis is called the
a) dependent variable
b) independent variable
c)
d)
The process of gathering information through the senses is called
a) analysis
b) observation
c) hypothesis
d) inference
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
A chemical bond that occurs when atoms share electrons is a(n) _____ bond.
a) covalent
b) ionic
c) magnetic
d) metallic
What is the name of the comound with the formula NaCl?
a) chlorine sodiate
b) sodium chlorate
c) sodium chloride
d) sodium monocholoride
How many electrons does an atom need to be stable?
a) 2
b) 4
c) 6
d) 8
What is a bond that forms when electrons are transferred from one atom to another?
a) ionic
b) crystal
c) electron
d) atom
What are the charged particle that form when atoms gain or lose electrons?
a) bonds
b) ions
c) atoms
d) valence electrons
What is the charge of an aluminum ion that has 13 protons and 10 electrons?
a) 1+
b) 2+
c) 3+
d) 3-
In Thomson's plum pudding model of the atom, the plums represent
a) atoms
b) protons
c) neutrons
d) electrons
An atom of gold with 79 protons, 79 electrons, and 118 neutrons would have a mass number of
a) 39
b) 158
c) 197
d) 276
The smallest particle into which an element can be divided and still be the same substance is called a(n)
a) nucleus
b) electrons
c) atom
d) neutron
Where are electrons likely to be found?
a) the nucleus
b) electron clouds
c) mixed throughout an atom
d) paths, or energy levels
If an isotope of uranium, uranium-235, has 92 protons, how many protons does uranium-238 have?
a) 92
b) 95
c) 143
d) 146
What particle did J.J. Thompson discover?
a) neutron
b) electron
c) atom
d) proton
Which statement about isotopes is true?
a) They have the same number of protons
b) They have the same number of neutrons
c) They have a different atomic number
d) They have the same mass
How many carbon atoms are in a molecule of glucose, C6H12O6?
a) 3
b) 6
c) 12
d) 24
In a solid, the particles
a) overcome the strong attraction between them
b) vibrate in place
c) slide past one another
d) move independently of one another
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