Chapter 3 Flashcards
A chemical bond occurs when…
two atoms are attracted enough to each other to stay together
A covalent bond occurs when….
electrons are shared between two atoms
A pair of shared electrons is known as…
a bonding electron pair
Electrons that are not involved in the covalent bond
lone pairs or non-bonding pairs
A group of two or more atoms (identical or different)
molecule
A combination of two or more different elements
compound
All ____ are ____ but not all ____ are _____
-compounds
-molecules
-molecules
-compounds
One shared pair of electrons is (2 electrons)
a single bond
____ forms when atoms share two pairs of electrons (4 electrons)
double bonds
_____ bonds form when atoms share three pairs of electrons (6 electrons)
Triple bonds
Atoms of different elements form
polar covalent bonds
Two identical atoms that have equal attraction to electrons in a bond and share them equally
nonpolar covalent bond
____ measures the attraction of an element for electrons
Electronegativity
Electronegativity increases from ____ to _____ and from _____ to _____ of the periodic table
-from left to right
-from bottom to top
____ are ions that form when atoms lose electrons
Cations
____ are ions that form when atoms gain electrons
anions
_____ forms when ions of opposite charge attrach each other
ionic compound
____ are formed by the attraction of opposite charges
ionic bonds
The rule of charge balance for an ionic compound says…
the total amount of positive charge must be equal to the total amount of negative charge
