C1 Atomic Structure Flashcards
How large is the nucleus?
1 X 10*-14 Meters (radius)
How large is an atom
0.1 nanometer
(1X10^-10) radius
What is the mass of an electron?
Very small. They are often measured as 0.
What is the charge of an atom?
An atom has no charge becuase it has the same amount of electrons (-1 charge) and protons (+1 charge).
In an ion there is a charge because there won’t be the same amount of electrons and protons.
What is the atomic number?
How many protons there are.
It is the smaller number and is the bottom number
THE PERIODIC TABLE IS ORGANISTED BY THE ATOMIC NUMBER
What is the mass number?
The amount of protons and neutrons
What is an element?
Something that only contains 1 type of atom
What is an isotope?
A varient of an element with the same number of protons but with a different amount of nuetrons.
An isotope will have the same atomic number but a different mass number
What is the relative atomic mass?
Since there are isotopes. The relative atomic mass is the avarage atomic mass of all types (isotopes) of the element.
How do you calcuate relative formular mass (Ar) of a singular element? (Isotopes)
Relative atomic mass = (isotope abundance X Isotope mass number)+(reptate for all of the known isotopes) ÷ 100(%of all isotopes added together, should always be 100%)
What is a compound
When there is a group of 2 or more elements which are chemicly bonded
What is a mixture?
A group of 2 or more elements that are not chemicly bonded
Why is it difficult to seperate a compound and not a mixture
Seperating a compound is usualy very difficult because you need another chemical reaction to seperate the chemical bonds that are holding the compound together
However
You don’t need to do a chemical reaction to seperate a mixture because there are no chemcial bonds to break.
