Worksheets

For today's Science lesson, we went through some worksheets and we were allowed to raise queries on the concepts which we did not understand.

3 Thoughts:
1) I have learnt that the similarities between an atom and an ion are that both of them have the same number of protons, neutrons and electron shells. As for the difference, an atom is neutral while an ion has a net charge (positive/negative).
2) I have also learnt that the difference between an oxygen atom and an oxygen molecule is that the oxygen atom has one atom but the oxygen molecule has several. As for their similarity, they both contain an oxygen atom.
3) I learnt that a mixture and a molecule of compound are different from one another. A mixture consists of different kinds of atoms mixed together. While a molecule of compound contains different kinds of atoms chemically combined together.

2 Questions:
1) Is it still considered a mixture when there is a presence of a mixture of atoms and molecules of element?
2) When the same kind of atoms mixed together, is it called a mixture or an element?

1 Useful application:
1) By clarifying all the misconceptions that we had, we are able to score better in our tests or examinations.