Exam (elaborations)
Atomic structure
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- LPSP1202 - Chapitre 12 - Troubles Du Sommeil
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Atomic structureWho had the first idea of the existence of an atom and when?-✅john
Dalton, 200 years ago
What particles are atoms made of?- ✅protons, neutrons and electrons
What is within the nucleus and what orbits?-✅nucleus=protons and
neutrons
orbit= electrons
✅
What are two properties of protons, neutrons and electrons that are
especially important?- mass and electrical charge
What is the number above a element?-✅mass number
What is the number below a element?-✅atomic number
How to count protons?-✅atomic Number from periodic table
How to count neutrons?-✅mass Number minus the number of protons
How to count electrons?-✅same as protons
What is an isotope?-✅atoms of the same element always have the same
number of protons, they may have different numbers of neutrons
What are the properties of an isotope?-✅the isotopes of an element are
identical in their chemical reactions.
How small is an atom?- ✅thickness of a crisp
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