Simple Molecular Substances Flashcards
Bonding, Structure, and Properties of Matter (22 cards)
What are simple molecular substances made up of?
Molecules containing a few atoms joined together by covalent bonds.
What is the atomic composition of Hydrogen?
One electron.
How many electrons do chlorine atoms need to complete their outer shell?
One more.
What type of bond do two chlorine atoms form when sharing electrons?
A single covalent bond.
What do two oxygen atoms share to fill their outer shells?
Two pairs of electrons.
What type of bond is formed between two oxygen atoms?
A double covalent bond.
How many electrons do nitrogen atoms need to complete their outer shell?
Three more.
What type of bond is created when two nitrogen atoms share electrons?
A triple bond.
What does the oxygen atom do in a water molecule?
Shares a pair of electrons with two hydrogen atoms.
How many covalent bonds can carbon form with hydrogen atoms in methane?
Four covalent bonds.
What is the chemical formula for water?
H2O.
What is the chemical formula for methane?
CH4.
What is the chemical formula for hydrogen chloride?
HCl.
What is a characteristic property of substances containing covalent bonds?
They usually have simple molecular structures.
What type of forces are present between molecules in simple molecular substances?
Weak intermolecular forces.
What needs to be broken to melt or boil a simple molecular compound?
Weak intermolecular forces.
What are the melting and boiling points of simple molecular substances typically like?
Very low.
What states are most molecular substances at room temperature?
Gases or liquids.
What happens to the strength of intermolecular forces as molecules get bigger?
The strength increases.
Do molecular compounds conduct electricity?
No, because they aren’t charged.
Fill in the blank: To melt or boil a simple molecular compound, you only need to break these _______.
Weak intermolecular forces.
True or False: The atoms within the molecules of simple molecular substances are held together by weak bonds.
False.
