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Chemistry Review
Test Description: Review for retest
Instructions: Answer all questions to get your test result.
1) Which scientist believed that atoms of the same elment are exactly alike?
A
Thomson
B
Dalton
C
Rutherford
D
Bohr
2) About how many elements are on the periodic table?
A
115
B
94
C
100-125
D
75-100
3) The columns (up and down) on the periodic table are called...
A
periods or rows
B
subscript
C
metalloids
D
families or groups
4) The elements on the periodic table are mostly...
A
metals
B
non metals
C
metalloids
D
alkali metals
5) Compounds are
A
two elements joined together
B
tow atoms bonded together
C
two or more electrons
D
two molecules
6) Elements have a wide range of....
A
numbers
B
properties
C
shapes
D
masses
7) Thomson's atomic model was called the______________ model
A
plum pudding
B
chocolate chip
C
electron cloud
D
valence electron
8) Jared has an element that is a shiny solid and conducts electricity. It is most likely...
A
a metalloid
B
a metal
C
a non metal
D
a halogen
9) The part of an atom that orbits the nucleus
A
neutron
B
electron
C
proton
D
cloud
10) The nucleus of an atom is made of ...
A
protons and electrons
B
protons and neutrons
C
neutrons and electrons
D
compounds and elements
11) Electrons have a _____________________ charge
A
postive
B
negative
C
electrical
D
neutral
12) Rutherford found that the atom was mostly
A
electrons
B
protons
C
empty space
D
neutrons
13) Greek philosopher that found the indivisible particles now known as atoms
A
Heisenberg
B
Socrates
C
Democritus
D
Dalton
14) Bohr's atomic theory and model stated that electrons circled the nucleus in patterns called...
A
the electron cloud
B
plum puddings
C
energy levels or shells
D
valence electrons
15) The current model of the atom
A
Bohr's model
B
gold foil model
C
electron cloud model
D
plum pudding model
16) The formula mass of a compound is...
A
the total number of atoms
B
the percentage of each element
C
the total atomic mass
17) To find the percent composition you must first
A
find the percent
B
divide by the total mass
C
multiply by 100
D
count the atoms of each element
18) Which is NOT found on the periodic table?
A
atomic number
B
element's symbol
C
date of discovery
D
atomic mass
19) An atom with 10 protons, 10 electrons and 15 neutrons would have an atomic mass of
A
20
B
10
C
25
D
35
20) Calcium Carbonate has 1 calcium (Ca) atom, 1 carbon (C) atom, and 3 oxygen (O) atoms. What is the formula?
A
CaCO3
B
CaO2
C
CaC3O
D
Ca3CO
*select an answer for all questions
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