Page 11 - Science E-Book Prep.2 2024-2025 1st term_Neat - Copy
P. 11
Atomic Atomic
Size Size
Atomic Atomic number
The atomic size is inversely The atomic size is directly
proportional to the atomic pprrooppoorrTttihoioennaaaltotliomntotighactresohgiauzreteopoauimstpodicimrneuiccmtlnybuemr inbear
number in a period.
2-Electronegativity
Electronegativity The ability of the atom in covalent molecule to
attract the electrons of the bond towards itself.
Polar compounds-They are covalent compounds in which the difference
in electronegativity between elements forming their molecules is
relatively high
Water molecule Ammonia molecule
The ability of an oxygen atom to The ability of a nitrogen atom to attract
attract the two electrons of the two electrons of the covalent bond
covalent bond towards is greater
than the ability of hydrogen atom. towards it, is greater than that of a
hydrogen
2nd Prep. First Term 14 11
