Flashcards
Electrons
Flashcards do conjunto (8)
- 1Electrons are the lightest of all the sub-atomic particlesThey weigh 1/1836 of the weight of a proton
- 2The radius of an electron is < \(10^-15\) mIt's impossible to see them with the naked eye!
- 3Electrons are negatively charged, and have the symbol \(e^-\)They have a charge of \(-1.602×10^-19\) Coulomb - The standard unit of charge
- 4The charge of the electron was measured by Robert Millikan with his oil-drop experimentWhen they performed the experiment in 1909, they only had an error margin of 0.3%!
- 5Unlike the protons and neutrons, the electrons orbit the nucleusThey travel at very high speeds
- 6In 1913, the scientist Niels Bohr proposed that the electrons were in orbits of different energy levelsThey can move between levels, but only if the emit or absorb a photon of a certain frequency
- 7The electrons enable atom to form chemical bondsA covalent bond is when atoms share a pair of electrons
- 8An ionic bond is when two charged atoms are attracted towards each otherA positively charged atom is a cation, and a negatively charged atom is an anion
Informações
- Descrição
- This Flashcard deck provides an overview of the properties of electrons
- Criado por
- ed.wilson89 · dez 2013
- Atualizado
- 6 ago 2016
- Visualizações
- 200
- Tags
- Histórico
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- Criado por leonie.examtime · 9 dez 2013
- Copiado por ed.wilson89 · 9 dez 2013
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