Flashcards
Sem título
Flashcards do conjunto (9)
- 1What is the most common element in the Universe?Hydrogen
- 2Name the 3 subatomic particlesProton, Neutron and Electron
- 3How is a star formed?Dust and gas clouds start to clump together due to gravitational attraction. As this occurs they become hot , nuclear reactions start to occur - a star is born.
- 4How is hydrogen formed?As the Universe starts to cool, particles move more slowly so electrons and protons are attracted to each other , forming.
- 5How are elements formed?Light elements are a result of fusion in stars as thee are layers of elements in a star with the heaviest in the centre. Heavier elements are formed when a massive star collapses then explodes as a supernova.
- 6What are the charges on subatomic Particles?Proton +1
Neutron 0
Electron -1 - 7What are the relative masses of subatomic Particles?Proton 1
Neutron 1
Electron 0.00055 - 8What is mass spectrometry?Atoms and molecules can be deflected by magnetic fields - provided the atom or molecule is first turned into an ion. Electrically charged particles are affected by a magnetic field although electrically neutral ones aren't.
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- FlashCards sobre Sem título, criado por Natalia Chlebowska em 19-04-2017.
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- Natalia Chlebowska
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