Transcript 6 review u5 r

Question of the Day
What is electronegativity?
Day 5
2-1
Electronegativity – ability to attract
electrons in a bond
How does it increase on the p. t. ?
In this bond: Cs—Cl, which way do
elecs. Shift? WHY?
Cl, > electroneg.
Organization of Your Periodic Table
G
R
O
U
P
S
P E R I O D S
K, Ti, and Fe are in the
same ___________.
Y, La, and Ac are in the
same ___________.
Organization of Your Periodic Table
1. What element is in Group 2,
Period 3?
2. Name an element in Group 3
3. How many valence electrons
in Xe?
4. Give me an element with 1
valence electron.
Metals
Excellent conductors (Sea of
__________
electrons) even as solids
Mobile electrons
Can be pulled
into wire
malleable and _______
ductile
Metals are _________
Can be pounded
into sheet
Organization of Your Periodic Table
Periodic Trends
What are ions?
- atoms that are charged due
to the loss or gain of
electrons
- If an atom loses elecs. it becomes …
- If an atom gains elecs. it becomes …
Which elements gain elecs.? Which
elements lose elecs.? Pattern?
Periodic Trends
How does the ionization energy
trend compare to the atomic
radius trend?
Does this make sense?
Periodic Trends
What’s bigger:
O or B
Be or Ca
Ca or
+3
B
↑er I. E.:
O
Be
-----
Periodic Trends
Ionization energy – energy
needed to remove one electron
from an atom
… indication of how strongly an atom
holds onto its outermost elecs.
Periodic Trends
Electronegativity – ability to
attract electrons in a bond (no
units  crazy!)
K—Cl
… In the compound above electrons
shift toward…? WHY?
Page 168
Valence electrons
Charges
Trends: atomic radius (size),
reactivity, electronegativity, ionization
energy