2. Look at the Aluminum atom and ion. What group on the Periodic Table is Aluminum found in and how many valance electrons does it have?
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Aluminum (Al), also spelled aluminium, chemical element, a lightweight, silvery-white metal of main Group 13 (IIIa, or boron group) of the periodic table
Aluminum is in the fifth column and therefore has 5 electrons in its outermost shell. It would tend to lose three electrons and form a +3 ion. It would tend to lose two electrons and form a +2 ion.
Aluminum is in the fifth column and therefore has 5 electrons in its outermost shell. It would tend to lose three electrons and form a +3 ion. It would tend to lose two electrons and form a +2 ion.
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- The nucleus (centre) of the aluminium atom contains 13 protons as well as some neutrons. The simple model of an atom suggests that the 13 electrons are arranged in shells (orbits) around the nucleus as shown in the diagram on the left. Aluminium is in group three of the Periodic Table.
- So... for the element of ALUMINUM, you already know that the atomic number tells you the number of electrons. That means there are 13 electrons in a aluminum atom. Looking at the picture, you can see there are two electrons in shell one, eight in shell two, and three in shell three.
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