Atomic structure 0.0 / 5 ? ChemistryAtomsGCSEEdexcel Created by: XxzoexXCreated on: 27-04-14 21:48 How do you find out the number of protons? The same number as atomic number 1 of 14 How do you find out the number of electrons? The same number as atomic number 2 of 14 How do you find out the number of electrons? Mass number subtract atomic number 3 of 14 What do all atoms have equal numbers of? Protons and electrons 4 of 14 How many electrons can the 1st shell hold? 2 5 of 14 How many electrons can the 2nd and 3rd shell hold? 8 6 of 14 How many electrons can the 4th shell hold? 18 7 of 14 What does the period number tell you? How many shells it has 8 of 14 What does the group number tell you? The number of electrons in the outer shell 9 of 14 When elements react together what does the atoms try and become? More stable by having a full outer electron shell 10 of 14 What does it mean if a metal is very reactive? The electron structure only needed to lose one electron to be stable-to be left with a full outer shell 11 of 14 What does it mean if a metal is unreactive? The electrons structure already has a full outer shell so doesn't need to gain or lose any electrons 12 of 14 Metal atoms all lose electrons to form... Positive ions 13 of 14 None metal atoms gain electrons to make... Negative ions 14 of 14
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