Flashcards
Atoms
Flashcards do conjunto (8)
- 1Atoms are the basic unit of matterThe center is called the nucleus
- 2The nucleus of the atom was discovered by Ernest Rutherford in the early 1900'sHe discovered them in his famous 'Gold foil' experiment
- 3The nucleus consists of protons and neutronsProtons have a positive charge, neutrons have a neutral charge
- 4The nucleus is surrounded by a cloud of electronsElectrons are negatively charged
- 5If an atom contains the same amount of protons as electrons it is...Electrically neutral
- 6Otherwise, it is electrically charged and is known as...An ion
- 7Atoms are extremely small - the diameter is less than a tenth of a nanometer!They can only be seen using a special microscope
- 8Over 99% of the atom's mass is in the nucleusThe weight of an electron is about 1/1836 that of a proton
Informações
- Descrição
- This Flashcard deck provides an introduction to the concept of atoms
- Criado por
- ed.wilson89
- Visualizações
- 73
- Tags
- Histórico
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- Criado por PatrickNoonan · 9 dez 2013
- Copiado por leonie.examtime · 9 dez 2013
- Copiado por ed.wilson89 · 9 dez 2013
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