Electronic structure diagrams

Seite 1

Calcium=2,8,8,2

the nucleus is shown as a black spot

each energy level is shown as a circle around the nucleus

each electron is shown by a dot or a cross.

Find the element in the periodic table. Work out which period (row) it is in, and draw that number of circles around the nucleus.

Work out which group the element is in and draw that number of electrons in the outer circle – with eight for Group 0 elements – except helium.

Fill the other circles with as many electrons as needed. Remember – two in the first circle, and eight in the second and third circles.

Finally, check that the number of electrons is the same as the atomic number.

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