Ions
What is the name of a positive ion?
Cation
What are valence electrons?
Only electrons in the outer-most shell
Ionic compounds combine following what rule?
The rule of zero charge
What ionic charge does Al (aluminum) have?
3+
What is the name of the following polyatomic ion?
CaSO4
Calcium sulfate
What is the name of a negative ion?
Anion
What are core electrons?
All the electrons NOT in the outermost shell
Ionic compounds are:
a combination of atoms that have equal and opposite charges.
What ionic charge does Ca (calcium) have?
2+
If two elements have the same number of valence electrons, they will have similar:
properties
Which side of the table makes cations?
left side
Why is a flame test useful?
To help determine the metal present in a compound.
How many valence electrons do ionic compounds want to have?
8, a multiple of 8 (unless you are looking at He)
Is MgO the correct ionic compound formula?
yes
What is the name of this ionic compound?
Li2S
Lithium sulfide
What charge do metals have?
Positive
If an atom has more electrons than protons it has which charge?
negative
Name an element that K (potassium) would want to combine with in a 1:1 ratio
(F, Cl, Br, I)
Does AlO3 show a proper chemical formula? If not, what is the correct formula?
No, Al2O3
You can tell the charge of a transition metal by:
Looking at what it is bonded with and applying the rule of zero charge
Heating metals in a flame does what to electrons?
It excites them, they can change energy shells causing a change in color
In main group elements, all the elements in a group have the same number of:
valence electrons
Name an element that Mg (magnesium) would want to combine with in a 1:2 ratio
(F, Cl, Br, I)
How do you make any salt compound?
1. combine metal and non metal atoms
2. valence electrons must equal 8 or a multiple of 8
3. make sure that the charge equals 0
What does the (III) in chromium (III) oxide indicate?
That chrome has a 3+ charge