Chemistry- formulae

Reactant

A chemical substance that is present at the start of a chemical reaction

product

A substance produced in a chemical reaction

Element

A pure substance made of only one kind of atom

Compound

A substance made up of atoms of two or more different elements joined by chemical bonds

Mixture

A combination of two or more substances that are not chemically combined

Elements on the left hand staircase of the periodic table are

metals

Elements on the right hand side of a periodic table are

non-metals

Staircase between non metal and metal starts at which group

3

What is between group 2 and 3 in the periodic table

transition metals

Proton

positively charged particle in an atom

What periodic table group has no charge

Group 0

Which periodic table group is odd and what is its charge?

Group 4 and it's charge it 4+/4-

When naming a compound consisting of metals and non-metals what comes first?

The name of the metal

What happens to the name of a non-metal when writing compound with just 2 elements?

The ending is changed to "ide"

What happens to the ending of a non metal when writing a compound containing two or more elements one of which is oxygen?

The ending is changed to "ate"

ionic compound

Compounds that's are made up of metals and non metals.

How are ions formed?

When atoms lose or gain electrons (charged)

How are ion charges determined

By the particles of the periodic table

periodic table groups

How elements are arranged in vertical columns.

Charges of a transitional metal

The charges vary and is identified using Roman numerals

Zinc(II) charge

2+

polyatomic ion

An ion containing more than one atom.

What is the overall charge of an ionic compound?

0 or neutral- number of positive charges equal to the number of negative charges.

Formulae of ionic compounds

Find what the lowest number of each ion is needed for the charges to cancel out.

How to write the formula for an ionic compound:

write the symbol for your metal first, then your nonmetal second excluding the cancel of ions

What happens if there are more than one of any ions in an ionic formula?

Write the number of ions in the bottom right corner of the element.

Balancing Equations

making sure the same number of atoms from each element matches on both sides of the arrow sign.

When balancing equations...

You should never change the formula of a substance but instead add numbers in front of a formula.

Ion

An atom with a positive or negative electric charge (+/-)

Molecule

A group of bonded atoms.