Identify the element: 6 energy level, metallic, 82 election

Pb or lead.

Explanation: The number of electrons in an element is equal to the number of protons. Since the number of protons determines the element, go on the periodic table and look for a atomic number of 82.

Hope that helps!

Answer:-

The merely correct answer is Lead (Pb) which I got an atomic no. 82.

No. of protons = 82

No. of electrons = 82

Group : 14 or IV A

Energy level or electron shells : 6

Metallic ✅

Check this out:

"you start with 15.67 g mgco3-xh2o, when heated and all the water is removed, you are left with 7.58 g mgco3 only.

therefore, you had 15.67 - 7.58 = 8.09g h2o  

moles of each :

7.58g mgco3 = ? moles = 7.58g / 83.4g/mole = 0.09moles  

8 09g h2o = ? moles = 8.09g / 18g/mole = 0.44moles  

molar ratio between the two by dividing both numbers by the smallest number :

0.09 / 0.09 = 1  

0.44 / 0.09 = 4.8  

mgco3-5h2o"