Download 10-24 The_Periodic_Table_1

QOD
What can you do today
to be more successful?
(three sentences)
1) Right your agenda
2) Answer the QOD on your own
sheet
3) Get out your notesheets.
What does each square contain?
What is The Atomic
Number ?
The number of
Protons in an
ATOM.
Where is The Atomic
Number on the
periodic table ?
The number of
Protons in an
ATOM.
What is The
Atomic Mass ?
The average number of
Protons plus the
average number of
NEUTRONS in an ATOM.
Where is The Atomic
Mass on the
periodic table ?
The number of
Protons in an
ATOM.
Where is The Atomic
Symbol on the
periodic table ?
The number of
Protons in an
ATOM.
How many letters
does an Atomic
Symbol have?
Either one or two. If
it has two letters,
the first letter is
capitalized and the
second is lower
case.
The Periodic
Table
What is the Periodic Table?
a) It is a method of organizing the elements.
b) It is a chart of the elements showing the
repeating patterns of their properties.
c) A Russian named Dimitri Mendeleev is
credited with its creation in 1869.
How was the periodic table created?
a) Mendeleev wrote each element’s melting
point, density, color, and atomic mass on
individual cards.
b) He arranged similar cards in groups by
increasing atomic mass.
c) He eventually arranged elements into groups
by similar properties instead of by atomic
mass.
Dimitri
Mendeleev
Mendeleev’s Periodic Table
How is the Periodic Table arranged?
a) The elements in the periodic table are
arranged by atomic number. Atomic
numbers increase from left to right.
b) It is also arranged by classes of elements –
metals, semimetals, nonmetals, and inert
gases.
c) The periodic table is arranged in horizontal
rows called periods.
d) The vertical columns are called groups.
What is a Period?
a) A period is a horizontal row of elements that
contains a series of different elements.
b) The properties of the elements change from
left to right. Metals are on the left,
semimetals in the middle, nonmetals on the
right next to the inert gases.
c) There are 7 periods. Period 1 has 2
elements, periods 2 & 3 have 8, periods 4 & 5
have 16, period 6 has 32.
What is a group?
a) The vertical columns are called groups.
b) A group is also called a family.
c) Elements in a group have similar
characteristics. For example, elements in
group 1 react violently with water while
elements in group 2 react very slowly or not
at all.
d) There are 18 groups. Lanthanides and
actinides do not belong in these groups.
Homework:
10-24 Insert