Formulae and Equations Flashcards
What is meant by a binary compound?
This is a compound that contains two elements only.
What type of element can form several ions with different charges?
Some metals, mostly transition ones.
The atoms on which side of the periodic table lose electrons to form cations?
The left.
What type of atom gains electrons to form anions?
Non-metal atoms.
How do you name binary compounds?
Use the name of the first element but change the ending of the second element’s name to -ide.
In what type of compound does the metal ion always come first?
Ionic compounds.
What is a polyatomic ion?
This is an ion that contains atoms of more than one element bonded together.
Give an example of a polyatomic ion.
OH-
NH4+
What is the overall charge of a formula?
0
When are brackets used?
If there is more than one polyatomic ion.
What is meant by the term “diatomic molecule”?
This is a molecule containing two atoms of the same element bonded together.
List the diatomic molecules (7)
H2, N2, O2, F2, Cl2,Br2, I2
What other element is found as a small molecule?
P4
Do covalent compounds contain ions?
No
What do most covalent molecules exist as?
Molecules with a small number of atoms bonded together.
