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What do elements consist of
Atoms with the same atomic number
What determines what type of atom it is
The number of protons in nucleus
What can atoms have different numbers of
Protons, neutrons and electrons
Symbol for Carbon
C
Carbon 13 formation
6 protons, 6 electrons, 7 neutrons
Carbon 12 formation
6 protons, 6 electrons, 6 neutrons
Example of elements with isotopes
Copper
Isotope mass number
Mass number of the atom
Abundance
the ratio of the number of atoms of a specific isotope of an element to the total number of isotopes present
Isotopes
Different forms of the same element, same number of protons, different number of neutrons
Relative atomic mass calculation
sum of (isotope abundance x isotope mass number ) /100
Atoms with two protons name
Helium
Atom with one proton name
Hydrogen
Number of elements
About 100
symbol for lead
Pd
symbol for iron
Fe
symbol of sodium
Na
symbol for magnesium
Mg
Symbol for Oxygen
0
Symbol for Hydrogen
Note 
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