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Atomic structure

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Institution LPSP1202 - Chapitre 12 - Troubles Du Sommeil
Module LPSP1202 - Chapitre 12 - Troubles du sommeil
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Atomic structure
Who 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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