Elements

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