Flashcards
Sem título
Flashcards do conjunto (21)
- 1Atom =subatomic particles = neutrons, protons, electrons
- 2Element =a pure substance made up of only one type of atom
- 3Moleculesgroup of atoms chemically bonded together
- 4Compound2 or more elements or molecules
- 5MixtureCombination of elements and compounds
- 6number of protons= atomic number
= proton number - 7changes in the number of protons and neutrons only happen whenradioactive decay, nuclear bombs and nuclear reactors
- 8Equations mass number =proton number + neutron number
- 9Bohr's model of atomsatoms trying to be noble gases
electrons trying to fill all the atom's shells
2,8,8,2 - 10what are ions?atoms with a + or - charge
- 11Cations?lost electrons
positive charge - 12Aniongained electrons
negative charge - 13Isotopessame element
different mass - 14what is an acid?A substance that release hydrogen ions into a water solution
- 15Base?A substance that releases hydroxide ions
- 16Nuclear decay?the emission of electromagnetic radiation
- 17when is Electromagnetic radiation emittedwhen the nucleus moves or vibrates
- 18stable nucleinever will undergo nuclear decay
- 19unstable nucleican eject electromagnetic waves and undergo nuclear decay
- 20Radioisotopesunstable atoms
- 21As extra neutrons are added to a nucleusunstable + radioactive
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- FlashCards sobre Sem título, criado por Dum plings em 21-03-2021.
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