Unit - 6 & 7 Flashcards
What is the criss-cross method used for?
Finding oxidation numbers
When an atom gains an electron it forms a ______ and has a ______ charge.
Cation
Negative
What is a chemical bond?
What holds elements together.
(A mutual electrical attraction between the nuclei and valence electrons of different atoms that bond the atoms together)
Ionic compounds do what?
Give up electrons
Metal
Covalent Bonds
Share electrons
Non-metals
Cations
Positive
Anions
Negative
Non-polar covalent bond
A covalent bond in which the bonding electrons are shared equally by the bonded atoms, resulting in a balanced distribution of electrical charge.
Polar
Referring to bonds
Meaning that they have an uneven distribution of charge
Polar covalent bond
A covalent bond in which the bonded atoms have an unequal attraction for the shared electrons.
Molecule
Neutral group of atoms that are held together by covalent bonds.
Molecular compound
A chemical compound whose simplest units are molecules.
Chemical formula
indicates the relative numbers of atoms of each kind in a chemical compound by using atomic symbols and numerical subscripts
Molecular formula
shows the types and numbers of atoms combined in a single molecule of a molecular compound
Oxidation numbers
The hypothetical charge that an atom would have if all it’s bonds were totally ionic
