Polarity of Simple Compounds Flashcards
It is formed by two non metals.
Covalent compound
What are the two types of covalent compound?
Polar and non polar covalent
Unequal sharing of electrons. It forms when atoms of different elements or atoms with different electronegativity are combined.
Polar covalent
Equal sharing of electrons. It can be formed when atoms of similar elements with equal electronegativity are combined.
Non polar covalent
It refers to the distribution of charge over the atoms connected by bond.
Polarity
It affects the properties of substances.
Polarity
Polarity relies on ?
Solubility
It affects the polarity of a molecule.
Electronegativity
It is the ability to pull electrons.
Electronegativity
Which group in the periodic table contains the highest electronegativity?
Group 7 (Halogens)
What is the most electronegative element?
Fluorine (From group 7 with an electronegative value of 4.0)
What does “like dissolves like” means?
Polar dissolves polar, and non polar dissolves non polar
What is the electronegativity difference scale?
0 - 0.4: Non polar covalent
0.5 - 1.9: Polar covalent
Above 1.9: Ionic compound
What is the other method where you can determine the compound type of an element, which is also the method that is more accurate?
Bond orientation
How can you determine the compound type through bond orientation?
Presence of lone pair in central atom: Polar covalent
There is no lone pair: Non polar covalent
Why does the presence of lone pair makes it a polar covalent compound?
The presence of lone pair signifies an unequal sharing of electrons.
Why does the group 7 in table of elements contain the highest electronegativity?
Because elements in group 7 already have 7 electrons which means that they have a higher chance to attract electron to make the element stable, which requires 8 electrons.
