Transcript How is the periodic table arranged?

Day 1 2-23
1.Which of the following are
larger?
F OR S-2
2. Give all 3 reasons why (BE
SPECIFIC!).
How is the periodic
table arranged?
1. Which of the following are larger?
Ca OR Sr
Cs OR Cs+1
Rb OR Ca+2
Partner Review
1. What element is in Group 17,
Period 3?
2. What family of elements is the
element above in?
3. How many valence electrons
does it have?
4. Which is more reactive Ne or F?
Day 2 2-24
1. Why are Na and K both in
group 1?
2. Why are Na and Mg both
in period 3?
How is the periodic
table arranged?
Electronegativity – ability to
attract electrons in a bond
Na—Cl
… In the compound above electrons
shift toward Cl because it is more
electronegative!
Notes page 6
What is electronegativity?
Electronegativity – ability to attract
electrons in a bond
How does it
increase on
the p. t. ?
How does it increase on the p. t. ?
In this bond: Mg—O, which way do
elecs. Shift? WHY?
O, > electroneg.
As of today, you should already have the
following:
Families colored in (page 168)
Valence electrons marked
+1, +2, -1,-2, and -3 ions marked
Reactivity trend (front / back)
Atomic size (front / back)
Added today:
Electronegativity (front / back)
Day 2 2-24
Ions =
Valence
electrons =
Atom size decreases
+1
1
8
Atom size increases
+2
2
3
Reactivity increases away
from the middle
-3 -2 -1
4 5 6 7
Metals
Noble gases
Halogens
electronegativity
Octet rule
Alkaline metals
Ion
Atomic size
Alkali metals Period 2
Read Section 6.3
and complete #s
18-25 on page 182
Names___________________
1. What element is in Group 18,
Period 3?
2. What family of elements is the
element above in?
3. How many valence electrons
does it have?
4. Which is more reactive Ne or F?
Names___________________
1. What element is in Group 17,
Period 3?
2. What family of elements is the
element above in?
3. How many valence electrons
does it have?
4. Which is more reactive Ne or F?