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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
Rutherford
C
Bohr
D
Dalton
2) About how many elements are on the periodic table?
A
75-100
B
115
C
100-125
D
94
3) The columns (up and down) on the periodic table are called...
A
metalloids
B
subscript
C
periods or rows
D
families or groups
4) The elements on the periodic table are mostly...
A
non metals
B
metalloids
C
metals
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
electron cloud
B
plum pudding
C
chocolate chip
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 non metal
C
a metal
D
a halogen
9) The part of an atom that orbits the nucleus
A
proton
B
neutron
C
cloud
D
electron
10) The nucleus of an atom is made of ...
A
neutrons and electrons
B
protons and electrons
C
protons and neutrons
D
compounds and elements
11) Electrons have a _____________________ charge
A
postive
B
neutral
C
electrical
D
negative
12) Rutherford found that the atom was mostly
A
neutrons
B
protons
C
electrons
D
empty space
13) Greek philosopher that found the indivisible particles now known as atoms
A
Socrates
B
Heisenberg
C
Democritus
D
Dalton
14) Bohr's atomic theory and model stated that electrons circled the nucleus in patterns called...
A
plum puddings
B
energy levels or shells
C
valence electrons
D
the electron cloud
15) The current model of the atom
A
Bohr's model
B
plum pudding model
C
gold foil model
D
electron cloud model
16) The formula mass of a compound is...
A
the total atomic mass
B
the percentage of each element
C
the total number of atoms
17) To find the percent composition you must first
A
find the percent
B
count the atoms of each element
C
divide by the total mass
D
multiply by 100
18) Which is NOT found on the periodic table?
A
atomic mass
B
date of discovery
C
atomic number
D
element's symbol
19) An atom with 10 protons, 10 electrons and 15 neutrons would have an atomic mass of
A
35
B
10
C
20
D
25
20) Calcium Carbonate has 1 calcium (Ca) atom, 1 carbon (C) atom, and 3 oxygen (O) atoms. What is the formula?
A
Ca3CO
B
CaCO3
C
CaC3O
D
CaO2
*select an answer for all questions
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