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| Questão | Responda |
| What are the sub-atomic particles that atoms are made up of called? | Protons, neutrons and electrons. |
| What are electrons? | Negatively charged particles that spin around the positive centre of the atom in cirlces called energy levels. Their mass is zero. |
| What are protons? | Positively charged particles that are contained in the nucleus of the atom. Thy have a relative mass of one. |
| What are neutrons? | Neutrons are also contained in the nucleus of the atom, but have no charge. They also have relative mass of one. |
| Why does the nucleus have an overall positive charge? | It contains only protons (positive) and neutrons (neutral). |
| Why do atoms have no overall charge? | They contain equal numbers of positive protons and negative electrons. |
| What does the atomic number tell you about an element? | How many protons there are in an atom of that element. |
| What is the mass number of an atom equal to? | The number of protons plus the number of neutrons. |
| What does the electron arrangement of an atom show? | How the electrons are arranged in the energy levels. |
| What are isotopes? | Atoms with the same atomic number, but different mass number. |
| What can the RAM be used for? | To give an indication of the relative abundance of isotopes in a sample |
| What is an ion, and how are they formed? | An ion is a charged particle, formed when atom gains or loses electrons due to an imbalance of electrons to protons. |
| Metal atoms...to form... Non-metal atoms...to form... | Lose electrons, positive ions Gain electrons, negative ions |
| Why do atoms gain or lose electrons? | They want to be like the noble gases which have a stable electron arrangement, and therefore won't react. |
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