Which of the two elements Mg and Al has a more stable structure?
Mg
Al
Both have stable structure
As we go from left to right in a period, the atomic radius
Increases
Decreases
Does not change
According to the Pauling scale, the most electronegative element is
Francium
Cesium
Fluorine
Electronegativity is defined as
A measure of the charge on the electrons surrounding the nucleus in an atom.
A measure of the tendency of an atom to attract a bonding pair of electrons.
A measure of the tendency of an atom to attract an electron towards itself.
In going from left to right in a period, the electronegativity values
Decrease
Increase
Increase and then decrease
The electronegativity value of Argon is
0.7
3
No value
The structures of elements, as you go from left to right in a period, change as follows
Na, Mg and Al have metallic structures. Si has giant covalent structure. P, S, Cl, Ar are simple molecules.
Na, Mg and Al are simple molecules. Si has metallic structure. P, S, Cl, Ar have a covalent structure.
All elements have same structure.
The electrical conductivity in period 3, as you move from left to right in the period
Remains constant
The forces of attraction between the molecules of Phosphorous, Sulphur, Chlorine and Argon are
Van der Waal attractions
Ionic bonds
Covalent bonds
The melting and boiling points of Phosphorous, Sulphur, Chlorine and Argon as compared to ones of previous elements in the period are
Lower
Higher
Equal
