Atomic Structure and The Periodic Table Flashcards
(41 cards)
Atoms have a radius of
0.1 nanometers (1 x 10-10 m)
The nucleus of an atom has a radius of
1 x 10-14 metres (1/10000 of the radius of an atom)
Atoms charge
Atoms don’t have an overall charge as it has equal protons and electrons
Name the region where most of the mass of the atoms is concentrated
The nucleus
What is the relative charge of an electron?
-1
Name the particles in the nucleus and give their relative charges
Neutrons (0) protons (+1)
Mass number
Number on top
Atomic number
Bottom number
Atoms are the
Smallest part of an element that can exist
What are isotopes
Have the same number of protons but a different number of neutrons
How to work out the relative atomic mass
Sum of (isotope abundance x isotope mass number)/ 100
What is a compound?
Two or more elements chemically combined (in fixed proportions)
How to work out the number of atoms in a compound
The sum of All elements involved
Name NaCl
Sodium chloride
How many atoms in C2H4
6
If C2H4 and H2 react to form C2H6, has a new compound been made?
Yes because the atoms in C2H6 are in different proportions to the atoms in the previous
What is a reactant
Everything on the left
What is a product
Everything on the right
Balance Na + Cl = NaCl
2Na + Cl2 = 2NaCl
Balance NH2 + O2 = NO + H2O
4NH3 + 5O2 = 4NO + 6H2O
What is a mixture
Consists of two or more elements or compounds that aren’t chemically combined together
Outline the procedure for setting up a chromatography experiment
1) Draw a line in pencil near the bottom of a piece of chromatography paper.
2) Place a spot of ink on the pencil line. Pour a shallow layer of water or solvent into a beaker. 3) Place the chromatography paper into the container. The water should be below the pencil line and the ink spots.
4) Place a lid in the container and wait for the solvent to rise to the top of the paper.
5) Remove the paper from the container when the solvent had risen close to the top of the paper.
Explain the results of a chromatography experiment
Count the spots that the dyes have made and state how many dyes were involved in the specific spots. State which are mixtures. State which dyes contain at least one of the same dyes (no clue what that meant but there you go)
What is filtration?
Filtration deprecated insoluble solids from liquids