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Monday, June 21, 2010

Questions: (Electro negativity)

Plot a graph represents the electro negativity and atomic number values of:
1.group 1A
2.Fluorine, chlorine, bromine, and iodine
3.The elements with atomic numbers 11 through 17

Answer: HERE
Referring to the Periodic Table, arrange the members of each of the following sets order of increasing electronegative:
1.O, P, and S         (O - S - P)        See the graph and Answer Why? 
2.Mg, Al, and Si     (Si - Al - Mg)   See the graph and Answer Why?
3.S, Cl, and Br       (Cl - Br - S)      See the graph and Answer Why?
4.C, Si, and N        (N - C Si)         See the graph and Answer Why?
Choose
The strength of an atom’s attraction for the electrons in a chemical bond is the atom’s
a.Electro negativity
b.Ionization energy
c.Heat of reaction
d.Heat of formation
Answer: a
Which of these elements have the strongest attraction for the electrons in a chemical bond?
a.Al
b.P
c.Si
d.S
Answer: b See the graph and Answer Why?
A characteristic of the halogens is that they have relatively:
a.low ionization energies
b.low electron affinities
c.high electronegative
d.Nothing of the above
Answer: c
Write short note about:
1.Electro negativity
2.Electron affinity
Compare between: Electro negativity and Electron affinity
Answer:

Electro negativity:
It is the tendency of an atom to attract electrons of the chemical bond to itself
Refers to atom in the molecular state
Electron affinity:
It is the energy needed to remove one or more electrons from a neutral atom to form a positively charged ion
Refers to atom in single state

1 comments:

dahen full said...

which element has the largest ionic radii

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