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Chemistry Final 2 Of 3
Test Description: Chem final part 2
Instructions: Answer all questions to get your test result.
1) Who discovered the neutron?
A
Schrodinger
B
Einstein
C
Chadwick
D
Bohr
2) Iron has 3 isotopes. 5.84% is Fe-54, 91.68% is Fe-56 and .31% is Fe-58. Without any calculations what is the approximate atomic mass of iron?
A
About 54
B
About 56
C
About 55
D
About 57
3) Discovered the charge and mass of the electron
A
Millikan
B
Thomson
C
Dalton
D
Chadwick
4) Developed the plum pudding model of an atom
A
Thomson
B
Dalton
C
Millikan
D
Rutherford
5) This element has 26 electrons, 29 neutrons, and 26 protons
A
Lead
B
Calcium
C
Helium
D
Iron
6) From the choices below which step would occur first?
A
Forming a hypothesis
B
creating experiments
C
drawing conclusions
D
making observations
7) A hypothesis...
A
does not have to be tested to be accepted as probably correct
B
Can be completely proven
C
is a possible answer to a question, tested through an experiment
D
a proven fact
8) A controlled experiment allows the scientist to test
A
one variable
B
a mass of information
C
a conclusion
D
several variables
9) The vertical columns in the periodic table are known as...
A
periods
B
groups
10) Silicon is lustrous and is a conductor of heat and electricity, but is not malleable or ductile. For this reason, silicon is known to be a
A
metal
B
all of the above
C
non-metal
D
metalloid
11) The elements in Groups 1 and 2 are known respectively as
A
Halogens, Transition Metals
B
Halogens, Noble Gases
C
Alkali metals, Halogens
D
Alkali metals, Alkali Earth Metals
12) The order of elements in the periodic table is based on
A
the electric charge of the nucleus
B
the number of neutrons in the nucleus
C
atomic mass
D
the number of protons in the nucleus
13) Atoms of elements that are in the same group have the same number of
A
valence electrons
B
protons and neutrons
C
protons
D
neutrons
14) Which of the following elements is an alkali metal?
A
Magnesium
B
Mercury
C
Calcium
D
Sodium
15) Carbon and other nonmetals are found in which area of the periodic table?
A
left most side
B
middle column
C
bottom rows
D
right side
16) Magnesium is located to the right of sodium because Magnesium has
A
no protons
B
fewer protons
C
no neutrons
D
more protons
17) In Medeleev's periodic table, elements in each column had similar?
A
atomic masses
B
properties
C
symbols
D
atomic numbers
18) How was Mendeleev's periodic table arranged?
A
by decreasing atomic number
B
by increasing atomic mass
C
by increasing atomic number
D
by decreasing atomic mass
19) Mendeleev left gaps in his periodic table because
A
protons belonged there
B
the table was too small
C
the table was too full
D
no known elements fit there
20) Each column of the periodic table is
A
an isotope
B
a group
C
an element
D
a period
*select an answer for all questions
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