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Transcript
Chapter 5.1 Notes:
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Atoms are the ________ form of elements
The most common element in the universe is _________ (about 90%).
The most common element in all living things is ________ (over 50%).
Each element has its own unique _________.
If an element has two letters as its symbol the first letter is always
________ and the second letter is always _____ _______.
List the symbols for: Hydrogen ___, Oxygen ____, Sulfur ____,
Carbon ___, Aluminum ____, Platinum ____, Zinc ___, Gold ____
Atoms are composed of three types of particles. _______,
______and _________.
A ________ is positively charged.
A neutron is an ________ particle.
Electrons are _________ charged.
The protons and neutrons of an atom are grouped together in the
atom’s center which is called the ________.
Electrons move around the _________ of the nucleus.
Atoms are extremely small. Over a million can fit in the period at the
end of this sentence.
The identity of an atom is determined by the number of protons in its
nucleus, called the ________ ________. For example, a hydrogen
atom has 1 proton so its atomic number is 1.
The total number of _______ and _________ in an atom’s nucleus is
called its atomic mass number.
_______ are atoms of the same element that have a different
number of neutrons.
Ions are formed when an atom loses or gains one or more _________.
Chapter 5.2 Notes:
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In 1869 __________ produced the first periodic table.
The periodic table organizes the atoms of the elements by
_________ and atomic number.
---copy the information under the red heading “Reading the Periodic
Table” on page 147 –
The elements in a column are known as a _______ and they are
labeled by a number at the top of the column.
Elements in a group are related in some way.
Each horizontal row is called a ________.
As you go from right to left the elements change by their number of
________.
Atomic size changes in a predictable way across, up and down the
periodic table.
Chapter 5.1 Notes:
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





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
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Atoms are the smallest form of elements
The most common element in the universe is hydrogen (about 90%).
The most common element in all living things is oxygen (over 50%).
Each element has its own unique symbol.
If an element has two letters as its symbol the first letter is always
capitalized and the second letter is always lower case.
List the symbols for: Hydrogen ___, Oxygen ____, Sulfur ____,
Carbon ___, Aluminum ____, Platinum ____, Zinc ___, Gold ____
Atoms are composed of three types of particles. Electrons, protons
and neutrons.
A proton is positively charged.
A neutron is an uncharged particle.
Electrons are negatively charged.
The protons and neutrons of an atom are grouped together in the
atom’s center which is called the nucleus.
Electrons move around the outside of the nucleus.
Atoms are extremely small. Over a million can fit in the period at the
end of this sentence.
The identity of an atom is determined by the number of protons in its
nucleus, called the atomic number. For example, a hydrogen atom has
1 proton so its atomic number is 1.
The total number of protons and neutrons in an atom’s nucleus is
called its atomic mass number.
Isotopes are atoms of the same element that have a different number
of neutrons.
Ions are formed when an atom loses or gains one or more electrons.
Chapter 5.2 Notes:
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In 1869 Mendeleev produced the first periodic table.
The periodic table organizes the atoms of the elements by properties
and atomic number.
---copy the information under the red heading “Reading the Periodic
Table” on page 147 –
The elements in a column are known as a group and they are labeled by
a number at the top of the column.
Elements in a group are related in some way.
Each horizontal row is called a period.
As you go from right to left the elements change by their number of
protons.
Atomic size changes in a predictable way across, up and down the
periodic table.