4852064
Descrição
FlashCards por Meriel ..., atualizado more than 1 year ago
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Criado por Meriel ...
mais de 8 anos atrás
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| Questão | Responda |
| What is the mass of an atom? | The mass of an atom is the total number of protons and neutrons it contains. |
| What is an Isotope? | Isotopes are atoms of an element that contain different amounts of neutrons |
| Is the mass number smaller or bigger than the atomic number? | The mass number of an atom is never smaller than the atomic number but can be the same |
| What is an atomic number? | The atomic number of an element s the number of protons and electrons it contains |
| Where is the atomic and mass number on a chemical symbol? | The mass number is at the top and the atomic number is at the bottom. |
| What is an atom with a full outer shell? | The atom is stable and so will not react with anything. |
| Why do atoms react with other atoms. | Because they are unstable as they do not have full outer shells and want to have full outer shells. A full shell is a happy shell! |
| What is an electron strucutre? | An electron structure is the number of electrons in each shell shown in order. e.g 2,8,1 for potassium |
| What is the number of shells in an atom the same as? | The number of shells in an atom is the same as the period it is in. e.g. Lithium is in period 2 so it has 2 shells of electrons |
| What is the number of electrons in the final outer shell of an element the same as? | The amount of electrons in the outer shell of an atom is the same as the group number it is in. (this has an exception of helium which has only 2 electrons and is in group 0 a.k..a. group 8, the rest in that group do have 8 electrons in the outer shell) |
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