The Atom (Leaving Cert Engineering): Flashcards
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14 cards from this deck
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Practise the cards
14 cards from this deck
Atom definition
Atom definition
Basic building block of all matter and chemistry
Three subatomic particles & their charges
Three subatomic particles & their charges
Protons (+), neutrons (neutral), electrons (-)
What does the nucleus contain?
What does the nucleus contain?
Protons and neutrons
Atomic number ()
Atomic number ()
Number of protons in the nucleus
What does atomic number determine?
What does atomic number determine?
What element the atom is
Mass number
Mass number
Number of protons plus number of neutrons
Isotopes
Isotopes
Atoms with same number of protons but different number of neutrons
Electron mass vs proton/neutron mass
Electron mass vs proton/neutron mass
1,836 times lighter
Can electrons exist at any distance from nucleus?
Can electrons exist at any distance from nucleus?
No, only in specific allowed orbits/energy levels
Max electrons in first shell
Max electrons in first shell
2 electrons
Max electrons in second shell
Max electrons in second shell
8 electrons
Valence shell
Valence shell
Outermost electron shell of an atom
Positive ion formation
Positive ion formation
Atom loses electrons
Negative ion formation
Negative ion formation
Atom gains electrons