Name Additional Questions (cont\'d) Section; Date: 3 What is the atomic number,

Question

Name Additional Questions (cont'd) Section; Date: 3 What is the atomic number, atomic weight and the oxidation number of aluminum metal? 4 Using the equations for reactions 1,2,3 and 4 in the introduction, calculate the number of grams of alum (AlK(S0)2 xH,0) that can be formed from 1.0g of aluminum foil. 5 What is the chemical difference between the form of aluminum species found in alum and that in the original aluminum foil? 6 Write the chemical reaction between the following pairs of substances. If no reaction occurs indicate this by n.r

Explanation / Answer

Ans 3 L:

The atomic number of an element is determined by the number of protons present in the nucleus of its atom.

So the atomic number of the element Aluminium is 13.

The atomic weight is the sum of neutrons and protons, so it is 26.98 u

The oxidation number of it is +3.

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