Chenistry Flashcards
What is the rule for electron configuration?
2, 8, 8 ,2
What is the charge for the 3 sub atomic particles
Protons=+1
Neutrons=0
Electrons=-1
What is an isotope
A nucleus with the same number of protons but different number of neutrons
Where on a element synbol does atomic number go
on the top
Where on a element symbol does atomic weight go
on the bottom
What particle has the smallest mass
electron
What is the mass number of an element
the number of protons and neutrons
What is an element
a substance that cannot be broken down into simpler substances by chemical methods
What is an compound
A substance containing 2 or more elements combined together
What is a mixture
Different substances but not chemicly joined in any way
What is an atom
the smallest part of an element that can exist on its own
What is a molecule
two or more atoms chemicly combined
What are ions
Ions are atoms that have gained electrons
How would you work out the neutron number in an element
Atomic mass minus atomic number
How would you work out the number of electrons
its the exact same as the atomic number
What are Anions?
Atoms that are negativly charged
What are Cations?
Atoms that are positivly charged
Where are metal ions found?
Ionic compounds
How is Paper Chromatography placed out?
A spot of ink is placed on the X mark and the paper is suspended in water. As the water rises up the paper, the different dyes travel different distances and so are seperated on the chromatogram.
What is paper chromatography used for?
To identify what an unknown liquid is made of
Where will the number of protons be on an element on the PT
It will be the smallest sumber out of atomic mass or atomic weight (if mass is 3 and weight is 7, the proton will be 3)
How would you find the amount of electrons on an element on the PT
Work the protons out first and then what ever the protons are, the electrons will be the same ( if the proton number is 8, the electron number will be -8)
How would you find the amount of Neutrons on an element on the PT
Work out protons, then since the atomic weight is protons and neutrons, minus the proton number from the atomic weight ( if protons = 5 and the wight is 14, you would do 14-5 = 9, neutrons = 9)
What is the mass for the 3 sub atomic particles?
Protons = 1 Neutron = 1 Electron = 1/2000
