Day 4 3-61.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 Review1. 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 5 3-91. 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?

How does it increase on the p. t. ?

Electronegativity – ability to attract electrons in a bond

How does it increase on the p. t. ?

In this bond: Mg—O, which way do elecs. Shift? WHY?

O, > electroneg.

Metals

Halogens

Octet rule

Ion

Alkali metals

Noble gases

electronegativity

Alkaline metals

Atomic size

Period 2

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 5 3-9

Valence electrons =

2

1

3 4 5 6 7

8

Ions = +1

+2 -3 -2 -1

Atom size decreases

Atom

size increases

Reactivity increases away from the middle

Electronegativity

increases from Fr to F

Read Section 6.3 and complete #s

18-25 on page 182