the atom

Created by

Jade cookson

Cards (24)

what is an atom
smallest part of an element to exist
what is daltons model of the atom
atoms as solid spheres that couldnt be divided into smaller parts
what is the plum pudding model
sphere of positive charge with negative electrons embedded in it
what did scientists discover in the alpha scattering experiment
some alpha particles were deflected by the gold foil . They showed that an atoms mass and positive charge must be concentration in once space nucleus.
describe the nuclear model of the atom
Dense nucleus with electrons it
what did Neil Bohr discover?
Electrons orbited and fixed energy levels
what did James Chadwick discover?
The uncharged particle called the neutron
where Are protons and neutrons
In the nucleus
what is the relative mass of the proton?
1
what is the relative mass of the neutron
0
what is the relative charge of the electron
-1
how can you find out the number of protons in an atom? 
Atomic number
how can you calculate the number of neutrons in atom?
Subtract the atomic number from the atomic mass.
Why do atoms have no overall charge?
Equal number of protons and electrons.
how many electrons would you place in the first second and third shellz
Up to 2 in first and 8 in second and third
what is an element? 
Substance made of only one type of atom
what is a compound?
A compound is a substance made up of two or more different elements chemically bonded together.
what is a mixture?
A combination of two or more substances that are not chemically bonded.
what are isotopes?
Atoms with the same number of protons but different number of neutrons
what are the four physical processes that can be used to separate mixtures?
Filtration, distillation, evaporation, and chromatography.
what is relative mass?
The average mass of all the atoms in an element
what is the relative mass of a proton?
1
what is the relative mass of a neutron?
1
what is the relative mass of an electron?
Very small