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![Page 1: Question of the Day Elements on the right side of the periodic table form _________ ions Elements in the same group form ___________ ions negative The.](https://reader036.fdocuments.us/reader036/viewer/2022070413/5697bf931a28abf838c8fd8c/html5/thumbnails/1.jpg)
Question of the DayElements on the right side of the periodic table form _________ ions
Elements in the same group form ___________ ions
negative
The same
Day 2 1-27
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Octet rule –
notes page 6
Octet rule – Atoms tend to gain, lose, or share electrons in order to acquire a full set of valence electrons (8)
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What is electronegativity?
How does it
increase on
the p. t. ?
Electronegativity – ability to attract electrons in a bond
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How does it increase on the p. t. ?
In this bond: Ba—S, which way do
elecs. Shift? WHY?
S, > electroneg.
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Periodic TrendsIonization energy – energy needed to remove one electron from an atom
Li → Li+ + e-
… indication of how strongly an atom holds onto its outermost elecs.
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Periodic TrendsThe graph on page 178 shows how ionization energies vary with atomic #
What element does the black point at (10, 2100) represent?
With respect to the periodic table ionization energies show 2 important trends…
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Periodic TrendsWith respect to the periodic table ionization energies show 2 important trends…
1. Decrease as you move down a group
2. Increase as you move left to right across a period
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Periodic Trends
How does the ionization energy trend compare to the atomic radius trend?
Does this make sense?
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Periodic Trends
O
Be
Be
Cl
------
What’s bigger: ↑er I. E.:
O or C
Be or Ca
Na or Be
Cl of Al
Ca or B+3
IN NOTES
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Periodic Trends
O
Mg
Be
Cl
------
What’s bigger: ↑er I. E.:
O or B
Mg or Sr
K or Be
Cl of Si
Sr or Al+3
IN NOTES
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Periodic TrendsSuccessive Ionization energies (removing more than one electron from an atom):
- The 2nd > 1st, the 3rd > 2nd, the 4th > the 3rd
- but if you look at the I. E. s there is usually a large jump. Where? PAGE 178
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Add the following trends:
Reactivity
Size (atomic radius)
Electronegativity
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Assignments
Online assignment = shssci.wikispaces.com
Read section 6.3 and complete #s 18, 19, 21, 22, 24, 25 on page 182
BOTH DUE BY THE END OF THE PERIOD!!!
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Periodic TrendsHow does atomic radius change?
Why?
How does ionization energy change?
Why?
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Ionization energy
Fluorine
Noble gas
Inert
Group 17
Malleable
Ductile
Alkali metals
Francium
Period 4
Electronegativity
Octet Rule
Double periods
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C
B
A
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Atomic mass
*** _________ ***
_______
Similar properties:
_______________
__________________ (groups)
Families
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