Bonding Flashcards
What is a cation?
A cation is a metallic ion.
Na and Cl bond so well because…
Na is a metal and its ion is Na+. Cl is a nonmetal and its ion is Cl-. Na has the electron chlorine wants, so they share it to create a noble gas configuration. This is a salt.
What is an anion?
An anion is a nonmetallic ion.
Why are ions formed?
Ions are formed so atoms can create a noble gas configuration.
What is the Lewis Dot Diagram for hydrogen?
.
H
What is the Lewis Dot Diagram for NaCl?
..
[Na]+[:Cl:]-
..
The plus sign next to Na and the negative sign next to Cl represent the charge, not addition and subtraction
How many lithium ions would be needed to neutralize the charge of an oxygen ion?
2 would be needed. A lithium ion has a charge of +1 and an oxygen ion has a charge of -2. You would need 2 lithium ions to create a charge of +2, which would neutralize the charge of -2.
Ionic compounds have a difference greater than or equal to
1.7
MgCl can be expressed as
2
Magnesium chloride
Iron (II) varies from iron (III) in what way?
The Roman numerals indicate the charge of the ion.
Iron (III) oxide can be expressed as
Fe O
2 3
Endothermic means
Absorbing heat (examples: melting, boiling)
Exothermic means
Releasing heat (example: combustion, aka fire)
What is an ion?
An ion is an atom that has lost or gained electrons to achieve a noble gas configuration.
What is a compound?
2 or more DIFFERENT atoms that are chemically combined in definite proportions.
NaCl - compound
Ammonium phosphate - compound
Ozone (O3) - not a compound
Are the radii of cations greater or smaller than that of the neutral state?
Smaller