Electronegativity - Periodic Trends

​Electronegativity

Electronegativity ...

A measurement which shows the tendency of an atom to "attract" electrons to itself

electronegativity

Atoms want to fill its valence shell (outermost). This makes the atom extremely stable.

Why would atom's want to "attract" electrons?

Group 8 electron configuration

Subject | Subject

​He: 1s²

Ne: [He] 2s²2p⁶

Ar: [Ne] 3s²3p⁶

Kr: [Ar] 4s²3d¹⁰4p⁶

Xe: [Kr] 5s²4d¹⁰5p⁶

Rn: [Xe] 6s²4f¹⁴5d¹⁰6p⁶

Open Ended

What do you notice about Group 8 element's electron configuration?

• The electron configuration of Group 8 elements completely fill the valence shell (s²p⁶).

• The filled valence shell makes Group 8 element very stable. They are called "noble gases".

• All elements want to have Noble Gas Electron Configuration.

Some text here about the topic of discussion

How can elements get Noble Gas configuration?

1. Losing electrons

2. Gaining electrons

3. Sharing electrons (Electronegativity explains sharing electrons.)

Multiple Choice

Which elements tend to have the higher electronegativity?

• Metals

• Nonmetals

Open Ended

What do you notice about the Nobel Gases?

Open Ended

Which element has the largest electronegativity?

Draw

Draw arrows showing INCREASING E.N. for the group and period.

Multiple Choice

Which has the largest E.N. ?

• N

• O

• C

• B

Multiple Choice

Which element has the largest E.N. ?

• S

• Te

• Rb

• Cs

Multiple Choice

Which element has the smallest E.N. ?

• Mg

• Be

• Sr

• Ba

Multiple Choice

Which shows increasing E.N. ?

• F, Cl, Br, I

• Cl, Si, Al, Na

• Ba Mg, Cl, F

• O, Se, K, Rb