Noble gases having col:18
so the valence shell is D.8
Ca(OH)2 is a strong base.
It’s name is calcium hydroxide and often it is easy to tell if something is a strong base if it has (OH) in the name.
Answer:
Explanation:
The relative massive alpha particles could go through the gold foil without being deviated of their trajectory or only small deviations due to the uniformity distribution positive charge of the protons.
According to the Avogadro’s law I mole of any substance contains = 6.023 x 1023
Number of molecules in one mole= 6.023 x 1023
Therefore number of molecules in 6.7 moles of AlCl3:
6.023x1023 molecules /1.0 mole * 6.7 mole
= 40.3541 x 1023 molecules
= 4.03541 x 1024 molecules
