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Description
Flashcards by Olivia Phillips , updated more than 1 year ago
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Created by Olivia Phillips
almost 10 years ago
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| Question | Answer |
| How many different types of atom are there? | There are about 100 different types of atom found naturally on Earth. |
| Why can you make millions of different substances from these different types of atom? | Atoms can combine in a huge variety of ways therefore giving us all those different substances. |
| Why is it useful to have symbols for atoms of different element? | The name we use for an element depends on the language being spoken. A lot of scientific work is international. So it is important that we have symbols for elements that everyone can understand. |
| What are the names of the three particles that make up an atom? | 1) Protons 2) Neutrons 3) Electrons |
| An oxygen atom has 8 protons - how many electrons does it have? | 8 electrons |
| What is the 14th element in the periodic table? | Silicon (Si) |
| Where are the electrons in an atom? | Electrons are arranged around the nucleus in shells. |
| Which shell represents the lowest energy level in an atom? | The shell which is nearest to the nucleus. |
| How many electrons can the first energy level hold? | 2 electrons. |
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