Download Compare in detail Democritus and Aristotle`s theories on matter

Compare in detail Democritus and
Aristotle’s theories on matter.
They were very different Democritus
believed that all matter was made of
small uncuttable shapes. Aristotle
believed that all matter was made of
earth, air, fire and water and believed
that all matter was hot, cold, wet and
dry.
Describe the difference between a
Lewis structure and a Bohr diagram.
Give an example.
Bohr diagrams show the protons,
neutrons and all of the electrons in
the energy levels. Lewis structures or
dot diagrams just show the valence
electrons.
7. What is an ion?
What are the 3 subatomic What is the atomic number and why is
particles that make up an it important?
atom? What are their
The atomic number tell you the number
charges?
of protons and identifies the element.
Proton= positive charge
Neutron= no charge
Electron= negative
charge
List the 7 scientists who
contributed to modern
day atomic theory and
briefly state what they
are know for.
Democritus-named the atom
Aristotle- Earth, Fire, Water,
Air= hot, cold, wet dry
Dalton- 1st atomic theory
Thomson-Electrons
Rutherford= nucleus and
empty space
Chadwick=neutrons
Bohr=Energy levels, electrons
follow set paths
Modern Cloud Theory=
Electrons can’t be located, just
estimated where they may be,
move 1 billion times a second
around the nucleus
8. How are mass number and
average atomic mass similar?
How are they different?
When a neutral atoms gives or
gains an electron and the overall
charge will change. When the
Average atomic mass number
protons and the electrons are
is the average of all the
not equal.
isotopes of that element. The
mass number is the atomic
mass number rounded to tell
you the number of neutrons
and protons.
10. Describe three patterns on the
11. Draw the atom.
periodic table of elements.
Atomic # 10
Elements are arranged in increasing
atomic number. The families have
the same number of valence
10-p
11-n
electrons. The energy levels increase
with the periods
Mass #21
What is an isotope?
An isotope is when the protons and
neutrons are not equal.
Describe the properties of metals,
nonmetals and metalloids. How are
they arranged on the periodic table?
Metals= left side of the table, malleable,
shiny, conduct heat and electricity, give
away electrons when bonding
Nonmetals= right side of the table
brittle, dull, not good conductors of heat
and electricity, gain electrons when
bonding
Metalloids- the “staircase” they share
properties of metals and nonmetals
9. Compare the bonding that occurs in
the first column of the Periodic table
and the last column.
The first column of the periodic table
only has one valence electron to give
away and they are highly reactive. The
last column of the periodic table is the
Noble gases and they have full outer
shelves, therefore they do not readily
react with any other element.
12. Is the atom in question 11 an ion or
an isotope? Explain.
Yes it is an isotope, the protons and the
neutrons are not equal.