Atoms and their energy levels
Answers are for parents and teachers.
1
Draw the energy levels for an atom with 12 electrons and write its arrangement.
2, 8, 2.
2
List three things in your kitchen that are matter and two things that are not.
Answers differ: for example water, a spoon and steam are matter; light from the lamp and a shadow are not.
3
Explain to someone at home why an atom is neutral.
It has equal numbers of positive protons and negative electrons, so the charges cancel.
4
Write two sentences about where the electrons of an atom are.
They move around the nucleus in energy levels. The first level K holds at most 2 electrons and the next one, L, holds at most 8.
5
Find the mistake: “Level K can hold 8 electrons.”
K holds at most 2. It is level L that holds 8.