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Chem Semester 1 Review Flashcards | StudBud
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Chem Semester 1 Review
Chem Semester 1 Review
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semester review for general chem
Flashcards
26 cards
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Practice quiz
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Questions
26
Answers
1
Elements that have properties of both metals and non-metals are called
transition metals
metallics
conductors
metalloids
2
Chemistry is the study of ____ and the changes it undergoes
radiation
matter
forces
energy
3
Which type of radioactive particle is this?
gamma emission
Beta e- emission
alpha particle
positron emission
4
What is this number in scientific notation? 3300
3.3 x 10-2
3.3 x 103
3.3 x 102
3.3 x 10-3
5
How many sig figs are in the measurement 2500 cm?
3
1
2
4
6
Which is true about the a chemical reaction?
mass of products equals reactants
mass of reactants increases
mass of products is less than reactants
mass of products is greater than reactants
7
Where are the alkali metals?
Group 2A
Group 8A
Group 7A
Group 1A
8
How many sig figs are in the measurement 2503 m?
3
1
2
4
9
What type of nuclear reaction is pictured?
beta decay
nuclear fusion
alpha decay
gamma decay
10
Which scientist proposed the “Plum Pudding” model of the atom?
Bohr
Dalton
Thompson
Rutherford
11
Avogadro’s Number is equal to
6.02 x 1023
6.02 x 10-23
6.20 x 1023
9.8 m/s2
12
The nucleus of an atom is ____.
negatively charged and has a high density
negatively charged and has a low density
composed of protons and neutrons
composed of protons and electrons
13
Which of the following is NOT an example of matter?
smoke
water vapor
heat
air
14
In the measurement 0.123 g, which is the estimated digit?
0
1
2
3
15
Isotopes of the same element have different ____.
protons
neutrons
atomic number
electrons
16
When an iron nail is ground into powder, its mass ____.
stays the same
decreases
increases
cannot be determined
17
Which group contains the halogens?
Group 7A
Group 1A
Group 8A
Group 2A
18
Which represents a compound?
H2O
H-3
O-16
H
19
The combination of two smaller nuclei to form a nucleus of greater mass is
fission
fusion
decay
radiocarbon dating
20
The length of this paperclip should be recorded as
2 cm
2.30 cm
2.0 cm
2.3 cm
21
Dalton said atoms are indivisible & atoms of an element are identical. It is now known that
atoms of one element can have different protons
atoms are divisible
atoms of an element must have the same mass
Dalton was completely correct
22
Which of the following is a homogeneous mixture?
salt water
sand and water
beef stew
soil
23
Which of the following elements is a transition metal?
chromium
sodium
lead
oxygen
24
If an ion has a charge of 2+ then it
lost two protons
gained two e-
lost two e-
gained two protons
25
How many sig figs are in the measurement 900.00?
4
2
5
1
26
Which of the following is a physical change?
evaporation
rotting of food
explosion
corrosion
