Which property of the atom above allows it to form large complex molecules with many other atoms
of the same element and other elements?
a.
the six protons in the nucleus allow the atom to bond with six other atoms.
the two energy levels allow the atom to bond with atoms at multiple energy levels.
the six total electrons allow the atom to bond with six other atoms.
the four valence electrons allow the atom to bond with four other atoms.
c.
d.

nacl or sodium chloride is an ionic compound. this is because an ionic compound pertains to a compound that consists of positively and negatively charged ions. in this case, na (sodium) has a tendency to lose one electron when it reacts with with other atoms, so the resulting sodium ion contains 11 protons and 10 electrons, thus making it positively charged (na+), when chlorine reacts, it usually gains one electron to form an ion called chloride, thus making it negatively charged ( since the ions are oppositely charged, they attract.

c-14 is carbon-14, or radiocarbon.   it is a radioactive isotope of carbon with an atomic nucleus containing 6 protons and 8 neutrons.