Bellwork
*Write the answer and a short
explanation as to why you chose that
answer.
Bellwork Question #1

Why is cobalt (Co) placed before nickel (Ni)
on the periodic table of the elements even
though it has a higher average atomic mass
than nickel?
 A. Nickel has one more proton.
 B. Cobalt was discovered first.
 C. Nickel has fewer electrons.
 D. Cobalt has a lower density.
Bellwork Question #2
 Which
of the following will allow you to
always determine the identity of an
element?
 A. The number of protons
 B. The number of electrons
 C. The number of neutrons
 D. The atomic mass
Bellwork Question #3
 Two
elements have the same number of
protons but different numbers of neutrons,
these two elements are known as:
 A. Family Members
 B. Isotopes
 C. Beta Particles
 D. Atomic mass units
Bellwork Question #4
 The
atomic number of Sodium is 11 and
the atomic mass of Sodium is 23. Which
of the following shows how many neutrons
sodium has?
 A. 11
 B. 12
 C. 23
 D. 34
State Standard 1a

Students know how to relate the position of
an element in the periodic table to its atomic
number and atomic mass.
The Atom
Subatomic Particles
A proton is a positive particle
 A neutron is a neutral particle
 An electron is a negative particle
 The proton and neutron are in the nucleus.

State Standard 1b

b. Students know how to use the periodic
table to identify metals, semimetals, nonmetals, and halogens.
Types
 Elements
on the periodic table belong
to one of three types metals,
nonmetals and semimetals
(metalloids)
Metals of the Periodic Table
Non-metals of the periodic table
Semimetals/ Metalloids
Families/Groups
Elements on the periodic table belong to
families/Groups.
 These families are- Alkali Metals, Alkaline
Earth Metals, Transition Metals, Halogens
and Noble Gases.

State Standard 1c
c. Students know how to use the periodic table
to identify alkali metals, alkaline earth metals
and transition metals, trends in ionization
energy, electronegativity, and the relative
sizes of ions and atoms.
Ionization Energy
 The
energy required to remove one
electron from an atom.
 Ionization energy increases as you
move to the right and up.
Electronegativity
 The
ability of an element to attract
electrons.
 Electronegativity increases right and up.
Atomic Radius

The size of atoms decreases to the right, and
increases as you move down.
Ions
 An
ion is an element with a charge.
 Cations (positive ions) are smaller
than anions (negative ions).
Ionic Radius

Ionic radius decreases to the right and
increases as you go down.
State Standard 1d
d. Students know how to use the periodic
table to determine the number of electrons
available for bonding.
Number of Electrons Available for
Bonding
 Bonding
Electrons AKA Valence Electrons
 Valence Electrons are the electrons in the
outer orbital.
Valence Electrons

Valence Electrons are the same by group #
State Standard 1e

e. Students know how to draw Lewis dot
structures.
Lewis Structure
 Lewis
Structure is the chemical symbol
surrounded by the number of valence
electrons.
Quiz
Question 1
How many valence electrons are shown
here?
 a. 13
 b. 8
 c. 3
 d. 5

Question 2
What family does Chlorine belong to?
 a. Alkali Metals
 b. Alkaline Earth Metals
 c. Transition Metals
 d. Halogens

Question 3
The largest family on the periodic table
is:
 a. Alkali Metals
 b. Alkaline Earth Metals
 c. Transition Metals
 d. Halogens

Question 4
Families on the periodic table share the
same number of:
 a. Protons
 b. Electrons
 c. Valence Electrons
 d. Neutrons

Question 5

A subatomic particle that carries no
charge and has a mass nearly equal
to that of a proton is a

A. proton.
 B. neutron.
 C. electron.
 D. isotope.
Question 6

Comparing Oxygen, Sulfur, Nitrogen
and Phosphorus.

A. Oxygen is the largest ion.
 B. Sulfur is the largest ion
 C. Nitrogen is the largest Ion
 D. Phosphorus is the largest ion.
Question 7
Which of the following atoms has the
largest atomic radius?
 A barium (Ba)
 B chlorine (Cl)
 C iodine (I)
 D magnesium (Mg)

Question 4

Which of the following elements has
Lewis dot structure most similar to
silicon?

A. Aluminum
 B. Gallium
 C. Germanium
 D. Arsenic