Topic 2 - Atomic Structure
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Describe protons
Relative mass: 1 Charge: +1 Location: the nucleus
Describe neutrons
relative mass: 1 Charge: 0 Location: the nucleus
Describe electrons
relative mass: 1/2000 Charge: -1 Location: the shells
What is the mass number?
Protons + neutrons
What is the atomic number and what does it determine?
Number of protons Determines the element
Define isotope
Atoms which have the same number of protons, but a different number of neutrons
Describe the relationship between isotopes and their chemical reactions
They are the same
What is a period in the periodic table?
A row Shows the number of shells
What is a group in the periodic table?
A column Shows the number of electrons in the outer-shell
How do you calculate RAM?
Add the products of the relative mass of each isotope and it’s percentage. Divide this by 100.