485489
Description
Flashcards by caitlinjardine, updated more than 1 year ago
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Created by caitlinjardine
almost 11 years ago
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| Question | Answer |
| Protons are... | heavy and positively charged |
| Neutrons are... | heavy and neutral |
| Electrons are... | tiny and negatively charged |
| The nucleus is... | -The middle of the atom -Positively charged because of the protons -TINY compared to rest of atom |
| What does the nucleus of an atom contain? | Protons (positive) and neutrons (negative) |
| Almost the whole mass of the atom is... | concentrated in the nucleus |
| Particle- Proton | Relative mass- 1 Charge- +1 |
| Particle- Neutron | Relative mass-1 Charge- 0 |
| Particle-Electron | Relative mass-0.0005 Charge- -1 |
| Neutral atoms have... | no charge overall. |
| The charge on the electrons is the same size as... | the charge on the protons- but opposite |
| The number of protons always equals the... | number of electrons in a neutral atom |
| If some electrons are added or removed... | the atom becomes charged and is then an ion |
| The number of neutrons isn't fixed but is usually about... | the same as the number of protons |
| Its the number of protons in an atom that decided what element it is... | e.g- any atom of the element helium will have 2 protons and any atom with 2 protons is helium |
| Atoms of the same element all have the same number of protons... | - and atoms of different elements will have different numbers of protons |
| Elements all have... | different properties from each other due to differences in their atomic structure |
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