National University
CAHINORC - INORGANIC AND ORGANIC CHEMISTRY [LEC]
NUR255
Name: Zardy Gabriel N. Andaya
CORNELL NOTES 2.1
LEARNING OBJECTIVES Notes
Differentiate the various
subatomic particles.
Discuss atomic number and
mass number and apply it in
determining number of
subatomic particles in both an
atom and ion.
Describe molecular weight and INSIDE THE ATOM
mole.
Atoms compose monoatomic (one
What are atoms composed of? atom) elements.
In the periodic table of elements,
How many natural elements 88 over 111 elements occur
are there in the periodic table naturally, wherein each element
of elements? has unique physical and chemical
properties.
REFLECTION
Atoms are composed of monoatomic elements.
88 over 111 elements in the periodic table occur naturally.
, NAMING ELEMENTS
Although there is no specific
criteria for naming, each
element has been assigned
specific names:
Symbols are based on the
How do you form the symbol initial letters of the
of a specific element? elements:
‒ If single or first to be
discovered is first
capital letter [e.g.,
Carbon (C), Hydrogen
(H), etc.].
‒ The second letter is
How do you form a symbol of added if the first letter
an element that has the same is the same [e.g.,
initial letter? Calcium (Ca), Helium
(He), etc.].
Why some of the elements in Some symbols are derived
the period name does not from their non-English
follow the rule above? names:
‒ Gold = (Au) Aurum
Can you give a great example ‒ Silver =(Ag) Argentum
of how some symbols are ‒ Tungsten = (W)
derived from their non-English Wolframium
names?
An atom consists of 3
What does an atom consists of? Subatomic particles:
What is the positive subatomic Protons (positive charge)
particle?
What is the neutral subatomic Neutrons (no charge)
particle?
What is the negative Electrons (negative
subatomic particle? charge)
REFLECTION
In forming symbols, the symbols are based on the first initial letter of the
element.
Atom are made up of 3 subatomic particles: Protons (+ charge), Neutrons (0
charge), and Electrons (- charge).
CAHINORC - INORGANIC AND ORGANIC CHEMISTRY [LEC]
NUR255
Name: Zardy Gabriel N. Andaya
CORNELL NOTES 2.1
LEARNING OBJECTIVES Notes
Differentiate the various
subatomic particles.
Discuss atomic number and
mass number and apply it in
determining number of
subatomic particles in both an
atom and ion.
Describe molecular weight and INSIDE THE ATOM
mole.
Atoms compose monoatomic (one
What are atoms composed of? atom) elements.
In the periodic table of elements,
How many natural elements 88 over 111 elements occur
are there in the periodic table naturally, wherein each element
of elements? has unique physical and chemical
properties.
REFLECTION
Atoms are composed of monoatomic elements.
88 over 111 elements in the periodic table occur naturally.
, NAMING ELEMENTS
Although there is no specific
criteria for naming, each
element has been assigned
specific names:
Symbols are based on the
How do you form the symbol initial letters of the
of a specific element? elements:
‒ If single or first to be
discovered is first
capital letter [e.g.,
Carbon (C), Hydrogen
(H), etc.].
‒ The second letter is
How do you form a symbol of added if the first letter
an element that has the same is the same [e.g.,
initial letter? Calcium (Ca), Helium
(He), etc.].
Why some of the elements in Some symbols are derived
the period name does not from their non-English
follow the rule above? names:
‒ Gold = (Au) Aurum
Can you give a great example ‒ Silver =(Ag) Argentum
of how some symbols are ‒ Tungsten = (W)
derived from their non-English Wolframium
names?
An atom consists of 3
What does an atom consists of? Subatomic particles:
What is the positive subatomic Protons (positive charge)
particle?
What is the neutral subatomic Neutrons (no charge)
particle?
What is the negative Electrons (negative
subatomic particle? charge)
REFLECTION
In forming symbols, the symbols are based on the first initial letter of the
element.
Atom are made up of 3 subatomic particles: Protons (+ charge), Neutrons (0
charge), and Electrons (- charge).
