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zzz [600]
3 years ago
13

Which two pairs are isotopes

Chemistry
1 answer:
Nastasia [14]3 years ago
5 0

Answer:

w and y

Explanation:

both have the same proton number but different neutron numbers .

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What is bromin what is bromine what is bromine
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viktelen [127]
Lewis Structure is drawn in following steps,

1) Calculate Number of Valence Electrons:
    
# of Valence electrons in Mg  =  2
# of Valence electrons in I      =  7
# of Valence electrons in I      =  7
                                               ---------
Total Valence electrons          =  16

2) Draw Mg as a central atom surround it by two atoms of Iodine.

3) Connect each Iodine atom to Mg, and subtract two electrons per bond. In this case we will subtract 4 electrons from total valence electrons. i.e.

Total Valence electrons           16
- Four electrons                    -   4
                                              ----------
                                                  12

4) Now start adding the remaining 12 electrons on more electronegative atoms i.e. Iodine.

The final lewis structure formed is as follow, 

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How do you calculate the mass of a product when the amounts of more than one reactant are given?
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The answer is C. Arrhenius bases increase the concentration of OH- in solution.
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