Covalent Bonds
What type of bond shares electrons?
A covalent bond.
The smallest part of an element.
What is an atom?
What type of elements form ionic bonds?
A metal and a nonmetal.
Where are valence electrons located?
In the outermost energy level.
What are rows on the periodic table called?
Periods.
Covalent bonds usually form between what types of elements?
Nonmetals.
A pure substance made of one type of atom.
What is an element?
What happens to electrons during ionic bonding?
Electrons are transferred.
How many valence electrons make an atom most stable?
Eight.
What are columns on the periodic table called?
Groups or families.
How many electron pairs are shared in a double bond?
Two pairs.
A substance formed when two or more elements chemically combine.
What is a compound?
What is a positively charged atom called?
A positive ion.
In polar molecules, are electrons shared equally or unequally?
Unequally.
In what direction do atomic numbers increase on the periodic table?
Left to right.
What is the strongest covalent bond?
A triple bond.
A force that holds atoms together.
What is a chemical bond?
What is a negatively charged atom called?
A negative ion.
What is a polar molecule?
A molecule with slightly positive and negative ends.
What do elements in the same group have in common?
Similar properties and the same number of valence electrons.
Covalent compounds usually have high or low melting points?
Low melting points.
An atom with a positive or negative charge.
What is an ion?
What type of bond forms between positive and negative ions?
An ionic bond.
What is an example of a polar molecule?
Water (H₂O).
What do electron dot diagrams show?
The number of valence electrons.