If a sodium ion has 11 protons, 12 neutrons, and 11 electrons, what is the atomic mass of the atom?

When determining the shape of a molecule, it is important to draw a lewis dot structure first in order to see the total number a. electrons within the moleculeb. bonding and unshared pairs around central atomc. unshared pair within the molecule( i really need it )

Stage in which a typical star has completely stopped fusion

If two identical atoms are bonded, what kind of molecule is formed