Flashcards
Untitled_1
Flashcards do conjunto (12)
- 1AtomsAll substances made of atoms. Only 100 different types.
- 2ElementsOnly about 100 elements because only 100 atoms.
- 3CompoundsMultiple atoms joined together
- 4NucleusCentre of atom
- 5ElectronsGo around the nucleus and are negative 1
- 6Protons and neutronsIn a nucleus, protons are positive1 and neutrons are neutral
- 7Mass numberNumber of protons and neutrons in the nucleus of an atom
- 8Atomic number isNumber of protons, which are also equal to number of electrons
- 9Electronic structureAn energy level or shell holds...1st 2 electrons, 2nd up to 8, once filled then add another shell
- 10Number of electrons in the outer shell of an element...Determines the way that element reacts
- 11Covalent bondsNon metal atoms share electrons and form a chemical bond.
- 12In chemical equations the Total mass of reactants =The total mass of products...therefore the equations have to balance.
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- FlashCards sobre Untitled_1, criado por amrpingu em 17-10-2013.
- Criado por
- amrpingu
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