c1.1 - atomic stucture

what charge do protons have?

neutrons have [blank_start]no[blank_end] charge

electrons appear on the [blank_start]shells[blank_end]. they have a [blank_start]negative[blank_end] charge, which shows as [blank_start]-1[blank_end].

can shells also be called energy levels?

Each element on the periodic table has a number in the top left corner. What did it show ?

Each element on the periodic table has a number in the bottom left corner. This shows the [blank_start]proton number[blank_end]

The [blank_start]mass[blank_end] number is worked out by adding the [blank_start]proton number[blank_end] with the number of [blank_start]neutrons[blank_end].

a graph which can help you work out what the atom will look like is called p.e.n?

You work out the [blank_start]p.e.n[blank_end] diagram by: 1. filling in the proton and [blank_start]electron[blank_end] (all [blank_start]stable[blank_end] atoms - no. of protons = no. of electrons) 2. to work out the neutrons [blank_start]take[blank_end] the [blank_start]mass[blank_end] number away from the [blank_start]proton[blank_end] number

you draw the [blank_start]atom[blank_end] by: 1. drawing the [blank_start]protons[blank_end] and neutrons in the [blank_start]nucleus[blank_end] 2. put electrons on the [blank_start]shell[blank_end] ( remember the order of electrons on a shell is [blank_start]2,8,8,18[blank_end])