E,C And M Flashcards
What is an element
A substance that is made of only one sort of atom
What is an compound
Atoms of different element combine during a chemical reaction
A common example of an compound
H2O
Co2
What scientist discovered the neutron
James chadwick
What scientist discovered the plum pudding model
JJ Thompson
What is the equation for relative atomic mass
Relative atomic mass=isotope mass x relative abundance + isotope mass x relative abundance /100
What are atoms made up of
Protons neutron electron and nucleus
What separation technique would be used to separate mixtures
Filtration crystallization and distillation
Describe the difference between the plum pudding model and the nucleur model
The plum pudding model suggested that the stone was a ball of positive charge whereas with the nuclear model it has positive protons only in the nucleus in the plum pudding model electron and all around the sphere of positive charge in the nuclear model the electron and placed at a fixated distance in shells and orbit the nucleus at a specific distance
What are the masses of protons electrons and neutrons
Proton=1
Neutron=1
Electron=1/2000
What is the relative charge or a proton neutron and electron
Proton= +1
Electron= -1
Neutron= 0
What is an isotope
An atom of the same element that have a different number of neutrons are isotopes
What is relative atomic mass
The average mass of an atom of an element
What is the standard electronic structure
2,8,8
How did Mendeleev structure the periodic table
By atomic weight
