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Physical Science 1st Semester Review Flashcards | StudBud
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Physical Science 1st Semester Review
Valence electrons determine an atom's
Evaporation refers to a change of state from
Physical Science 1st Semester Review
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Physical Science
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Answers
1
Evaporation refers to a change of state from
liquid to solid
liquid to gas
solid to gas
gas to liquid
2
Valence electrons determine an atom's
electric charge
chemical properties
mass
period
3
Which group of metals is the most reactive?
other metals
alkaline earth metals
transition metals
alkali metals
4
The heavier a particle, the _____ it moves.
slower
faster
more
5
Which of the following statements about krypton is untrue?
Krypton forms +1 ions
Krypton is a noble gas
Krypton has an atomic number of 36
Krypton has 36 electrons
6
Which science deals most with energy and forces?
botany
agriculture
biology
physics
7
How many neutrons does an atom of Iron-56 have in its nucleus?
30
26
82
56
8
During which of the following changes of state do atoms become more ordered?
sublimation
melting
condensation
boiling
9
Which of the following is NOT a potential sign of a chemical change?
production of light
change of color
release of gas
evaporation of water
10
The smallest unit of an element that maintains the properties of that element is a(n)
atom
substance
molecule
compound
11
The majority of the elements in the periodic table are
metals
synthetic
noble gases
nonmetals
12
A subatomic particle with a negative charge is a(n)
photon
electron
neutron
proton
13
If an atom has a mass of 11 u and contains 5 electrons, its atomic number must be
55
5
16
6
14
Matter that flows to fit its container includes
liquids and solids
liquids
gases
gases and liquids
15
Which of the following assumptions is NOT part of kinetic theory?
Particles move slower at lower pressure.
Particles move faster at higher temperatures.
All matter is made up of tiny, invisible particles.
The particles are always moving.
16
Which state of matter will hold its shape without a container?
solid
liquid
plasma
gas
17
Which branch of science is NOT included in physical science?
astronomy
zoology
physics
chemistry
18
Compounds and elements are
dense
pure substances
mixtures
always solids
19
How did Mendeleev arrange atoms in the periodic table?
by atomic mass
by the number of neutrons
by the number of electrons
by atomic number
20
Which of the following is a mixture?
sulfur
air
salt
water
21
An atom of which of the following elements is unlikely to form a positive ion?
potassium, K
silver, Ag
selenium, Se
barium, Ba
22
What group of elements is the least reactive?
semiconductors
halogens
noble gases
alkali metals
23
Which of the following terms most accurately describes carbon dioxide?
compound
element
solution
mixture
24
Which of Dalton's statements about the atom was proven false by Thomson?
Atoms are tiny
Atoms of different elements are not identical
Atoms join to form molecules
Atoms cannot be subdivided
25
Which state of matter is the most common in the universe?
gas
liquid
solid
plasma
26
A mixture that is not the same throughout
homogeneous
element
heterogeneous
compound
27
According to the modern model of the atom,
the number of protons for a given element varies
electrons and protons circle neutrons
moving electrons form an electron cloud
neutrons have a positive charge
28
What does Li+ represent?
a lithium molecule
a lithium atom
a lithium ion
a lithium isotope
29
What subatomic particles can be found in regions called orbitals?
photons
protons
neutrons
electrons
30
The first step in the scientific method is usually
collecting data
testing a hypothesis
forming a hypothesis
making an observation