The correct answer is B. The shape of a molecule where three pairs of electrons are shared is a trigonal planar. This is characterized by one central atom and three atoms forming an equilateral triangle which is bonded to the central atom.
13
Al
Aluminum
Atomic mass 26.982
I believe the answer is 50.5 molecules
<span>Eukaryotic cells contain organelles that perform specialised functions.</span>
The atomic mass on the periodic table represents the sum of number of protons and number of neutrons.
Atomic mass = Number of protons + number of neutrons
Hope this helps!
