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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
Bohr
B
Einstein
C
Chadwick
D
Schrodinger
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 55
B
About 54
C
About 56
D
About 57
3) Discovered the charge and mass of the electron
A
Chadwick
B
Millikan
C
Dalton
D
Thomson
4) Developed the plum pudding model of an atom
A
Thomson
B
Rutherford
C
Millikan
D
Dalton
5) This element has 26 electrons, 29 neutrons, and 26 protons
A
Calcium
B
Lead
C
Helium
D
Iron
6) From the choices below which step would occur first?
A
Forming a hypothesis
B
drawing conclusions
C
making observations
D
creating experiments
7) A hypothesis...
A
Can be completely proven
B
does not have to be tested to be accepted as probably correct
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
several variables
B
a mass of information
C
one variable
D
a conclusion
9) The vertical columns in the periodic table are known as...
A
groups
B
periods
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
non-metal
C
all of the above
D
metalloid
11) The elements in Groups 1 and 2 are known respectively as
A
Alkali metals, Halogens
B
Halogens, Noble Gases
C
Halogens, Transition Metals
D
Alkali metals, Alkali Earth Metals
12) The order of elements in the periodic table is based on
A
the number of protons in the nucleus
B
the electric charge of the nucleus
C
the number of neutrons in the nucleus
D
atomic mass
13) Atoms of elements that are in the same group have the same number of
A
valence electrons
B
protons
C
protons and neutrons
D
neutrons
14) Which of the following elements is an alkali metal?
A
Sodium
B
Calcium
C
Mercury
D
Magnesium
15) Carbon and other nonmetals are found in which area of the periodic table?
A
right side
B
bottom rows
C
left most side
D
middle column
16) Magnesium is located to the right of sodium because Magnesium has
A
no neutrons
B
more protons
C
no protons
D
fewer protons
17) In Medeleev's periodic table, elements in each column had similar?
A
symbols
B
atomic numbers
C
atomic masses
D
properties
18) How was Mendeleev's periodic table arranged?
A
by increasing atomic mass
B
by decreasing atomic number
C
by decreasing atomic mass
D
by increasing atomic number
19) Mendeleev left gaps in his periodic table because
A
the table was too full
B
protons belonged there
C
no known elements fit there
D
the table was too small
20) Each column of the periodic table is
A
an element
B
a period
C
an isotope
D
a group
*select an answer for all questions
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