structure of an atom

ccc 2nd year science

an atom is

the basic building blocks off all things

describe the properties of protons

location in the atom - nucleus

relative mass - 1

relative charge - +1

describe the properties of neutrons

location in the atom - nucleus

relative mass - 1

relative charge - 0

describe the properties of electrons

location in the atom - shells

relative mass - basically none

relative charge - -1

a diagram of an atom

what info does the atomic number of an atom give us

the amount of protons and electrons e.g. aluminums’s atomic number is 13 so there is 13 protons and 13 electrons

what info doe the mass number of an atom give us

when you minus the atomic number from it it gives you the number of neutrons e.g. aluminums mass number is 27 so 27 - 13 = 14 so the number of neutrons is 14

how do you draw a diagram of an atom

1. find out the atomic and mass number

2. draw a circle and write the amount of neutrons and protons in this circle

3. the amount of electrons in the atom varies the amount of circles around the centre circle

4. e.g. there are 16 electrons

5. there can be 2 electrons in the first shell, 8 in the second and 8 in the third