Rutherford

Topics: Chemical element, Atomic number, Periodic table Pages: 2 (298 words) Published: October 2, 2013
Bohr - Rutherford Interactive Investigation

1. Complete the following chart as you work through the investigation. Atomic Number
Element Symbol
Element
Name
Number of Protons
Number of Electrons
Mass Number
Number of Neutrons
Electron Configuration 18 ArArgon181840222, 8, 85932610138114171547111216 2a) Now rearrange the chart above so that the elements appear in order of their atomic number and as they appear on the periodic table. Atomic NumberElement SymbolElement

NameNumber of ProtonsNumber of Electrons Mass NumberNumber of NeutronsElectron Configuration 123456789101112131415161718 ArArgon181840222, 8, 8 b) What pattern do you see in the number of electrons moving across the periodic table? 3a) Lithium and sodium both behave similarly in chemical reactions. How many electrons do these elements have in their outer orbit? b) Potassium has the same chemical behaviour as lithium and sodium. Where is potassium found on the periodic table in relation to lithium and sodium? c) How many electrons do you suppose that potassium has in its outer orbit? 4a) Fluorine and chlorine both behave similarly in chemical reactions. How many electrons do these elements have in their outer orbit? b) Bromine has the same chemical behaviour as chlorine and fluorine. Where is bromine found on the periodic table in relation to chlorine and fluorine? c) How many electrons do you suppose that bromine has in its outer orbit? 5a) Helium, neon, and argon behave similarly in chemical reactions. What do you notice about the outer orbit of electrons in these elements? Hint: How many electrons did Bohr say each element could have in its outer shell? b) Krypton has the same chemical behaviour as helium, neon and argon. Where is Krypton found on the periodic table in relation to helium, neon and argon? c) Using your answer in 5a) as a guide, explain what you would expect to see in the outer electron orbit of Krypton.
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