Atomic Structure, Analysis And Quantitative Chemistry Flashcards
1
Q
The total number of protons and neutrons in an atom is called…
A
Its mass number.
2
Q
Define isotope
A
Atoms of the same element but have a different number of neutrons.
3
Q
Calculate relative formula mass
A
Add the relative atomic masses together.
4
Q
What is paper chromatography used for?
A
Detecting artificial colours.
5
Q
What is gas chromatography used for?
A
Allows the separation of a mixture of compounds.
6
Q
How can you identify the substance in chromatography?
A
The time taken to travel through the column and the colours.
7
Q
The number of peaks on the output of a gas chromatography indicates…
A
The number of compounds present.
8
Q
Percentage mass
A
MaaXmolar massX100
9
Q
Percentage yield
A
What you actually got/what you should of got X 100
10
Q
Empirical formula
A
Find each mass. Find each atomic number. Divide the mass with the atomic numbers. Find the ratio. Write the formula e.g 2NO3
11
Q
Molar mass
A
Add masses together.
