Ions & Molecules Flashcards
Covalent Bonds
2 atoms SHARE pairs of e-
Ionic Bonds
e-TRANSFER bt/wn 2 atoms
Compound
A group of atoms held together by chemical bonds
What are the two different chemical bonds?
Covalent & Ionic Bonds
Anions
GAINING an electron
Sign is negative
Cations
LOSES an electron
Sign is positive
When neutral atoms gain electron(s) to form anions, they are typically named with an ________ suffix.
-ide
A pure ionic bind has perfectly ______ sharing of electrons
Unequal
A pure covalent bond has a perfectly _____ sharing of electrons
Equal
Which chemical bond is associated with ‘molecule’ ?
Covalent compounds
Which chemical bond is associated with ‘formula unit’?
Ionic Compounds
Elements in groups 15-17 usually have a ________ charge
Negative
Polyvalent
Cations of different charges
Most of the transition metals (d-block) are _______.
Polyvalent
In ionic compounds, the charge for a ____________ is usually included using Roman Numerals.
Transition metal cation
When naming a cation within an ionic compound we only include the charge if it is a __________ cation.
Polyvalent
Any ionic compound will have a net charge of ___.
Zero
(Cations and anions charge cancel out)
Formula for charge for anions in polyvalent cations
Charge of of cation × # of ions in cation
__________________________________________
# of ions in anion
