Created by rebeccahumphries
about 9 years ago
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Question | Answer |
What do sub atomic particles have | A charge and mass |
How do you work out the mass of a sub atomic particle? | Adding together protons and neutrons |
What happens to the charges when the atom has and equal number of protons and electrons. | They cancel out |
What charge to neutrons have | None, they are neutral |
How do you work out the mass number of an atom | You add up the protons and neutrons |
How many electrons does the first shell of an atom hold | 2 |
How many electrons does the second shell of an atom hold | 8 |
What is the charge of a neutron | Positive + |
What is the charge of an electron | Negative - |
Whats the relative mass of a proton | 1 |
What's the relative mass of a neutron | 1 |
What the relative mass of an electron | 0.0005 |
How many electrons does the third shell of an atom hold | 18, but only fills up with 8 before the next shell is started |
What is always identical in the atom? | The number of protons and electrons |
What do atoms with the same number of electrons on their outer shell have? | Similar chemical properties |
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