atomic structure - chemistry in earth systems · 2020. 3. 11. · how to find the number of...
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Atomic StructureCarolina Robles & Alexis Garcia
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The Periodic Table helps us determine many things about the Atomic Structure of an Atom
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Let’s take a look at the element Sulfur for example:
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Where the Atomic Number of an Element is located
Atomic Number
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How to find the atomic mass of an Element:
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How to find the atomic mass of an Element:
Atomic Mass
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How to find the number of protons, electrons, and neutrons:
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Protons
Number of Protons
The number of protons an element has, is the same as the atomic number.
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To find the number of electrons subtract the atomic number from the atomic mass. So for Sulfur you would subtract 16 from 32. The number of electrons is 16.
Electrons
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Neutrons
To find the number of neutrons is the same as finding the number of electrons. You would subtract 16 from 32. So the number of neutrons is 16.
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Bohr ModelTo draw the bohr model for
oxygen you place the number of
protons and neutrons in the
nucleus.
Then you place the electrons in
the shells , The first shell can
contain up to 2 electrons the
second shell can contain up to 8
electrons.
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How are Elements represented in Isotope Notation?
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How to find how the number of valence electrons an element has:
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Quiz
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1. Where is the atomic number located?
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Atomic Number
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2. What is the Atomic Mass of Sulfur?
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Atomic Mass
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3. How many electrons does carbon have?
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Carbon has 6 electrons.
When you subtract the atomic number which is 6
from the atomic mass which is 2 you get 6 electron.
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4. What is an Isotope?
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4. What is an Isotope?
An isotope is the same element of which contain the same
number of protons but different number of neutrons.
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5. How many valence electrons does the element Chlorine have?
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The element, Chlorine, has 7 valance electrons.