Chemistry Review Question Preview (ID: 24507)
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Which scientist believed that atoms of the same elment are exactly alike?
a) Dalton
b) Thomson
c) Rutherford
d) Bohr
About how many elements are on the periodic table?
a) 75-100
b) 100-125
c) 115
d) 94
The columns (up and down) on the periodic table are called...
a) periods or rows
b) subscript
c) families or groups
d) metalloids
The elements on the periodic table are mostly...
a) metals
b) alkali metals
c) non metals
d) metalloids
Compounds are
a) two or more electrons
b) two molecules
c) tow atoms bonded together
d) two elements joined together
Elements have a wide range of....
a) shapes
b) properties
c) masses
d) numbers
Thomson's atomic model was called the______________ model
a) valence electron
b) electron cloud
c) chocolate chip
d) plum pudding
Jared has an element that is a shiny solid and conducts electricity. It is most likely...
a) a halogen
b) a metalloid
c) a metal
d) a non metal
The part of an atom that orbits the nucleus
a) electron
b) proton
c) neutron
d) cloud
The nucleus of an atom is made of ...
a) protons and electrons
b) protons and neutrons
c) neutrons and electrons
d) compounds and elements
Electrons have a _____________________ charge
a) negative
b) postive
c) neutral
d) electrical
Rutherford found that the atom was mostly
a) neutrons
b) electrons
c) protons
d) empty space
Greek philosopher that found the indivisible particles now known as atoms
a) Socrates
b) Democritus
c) Heisenberg
d) Dalton
Bohr's atomic theory and model stated that electrons circled the nucleus in patterns called...
a) the electron cloud
b) valence electrons
c) energy levels or shells
d) plum puddings
The current model of the atom
a) electron cloud model
b) Bohr's model
c) gold foil model
d) plum pudding model
The formula mass of a compound is...
a) the total atomic mass
b) the total number of atoms
c) the percentage of each element
d)
To find the percent composition you must first
a) divide by the total mass
b) count the atoms of each element
c) multiply by 100
d) find the percent
Which is NOT found on the periodic table?
a) atomic mass
b) atomic number
c) element's symbol
d) date of discovery
An atom with 10 protons, 10 electrons and 15 neutrons would have an atomic mass of
a) 25
b) 35
c) 20
d) 10
Calcium Carbonate has 1 calcium (Ca) atom, 1 carbon (C) atom, and 3 oxygen (O) atoms. What is the formula?
a) CaO2
b) CaC3O
c) Ca3CO
d) CaCO3
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