1How are ionic bonds formed?
one atom gives up or gains electrons in order to have the same electronic configuration of stable nobel gases (a full outer shell).
Produce a cation when they lose electrons to form a positive ion
Produce an anion when gain electrons to form a negative ion
2Define ion
an atom with a positive or negative charge due to the loss or gain of one or more electrons.
3How to represent ionic bonding
1) Draw both original elements with one dotted electrons , one crossed
2) Draw arrow and both ions with gained/lost electron
3) Draw square brackets around both
4) Draw +/- charge
4How to calculate protons, neutrons and electrons given the atomic and mass number in an ion
proton= atomic number
electrons= more or less depending on if they gain or lost any
neutrons= mass number- proton number
5Formation of an ion in group 1
lose 1 electron (-)
6Formation of an ion in group 2
lose 2 electrons (2-)
7Formation of an ion in group 6
gains 2 electrons (2+)
8Formation of an ion in group 7
gains an electron (+)
9What does the ending -ide mean in compounds?
Compound contains just 2 elements and a negative ion
10What does the ending -ate mean in compounds?
Compound contains 3 or more elements
11How to find the formula of ionic compounds
If an element has a charge of 2+ and the other in the compound had only 1-, you'll need 2 of that 1- so you add a subscript. For example Calcium Bromide = CaBr2
12Explain the structure of an ionic compound as a lattice
Regular repeating arrangement of ions held together by strong electrostatic forces between oppositely charged ions