How many of the following elements have 2 unpaired electrons in the ground state? c, o, ti, si a) 1 b) 3 c) 4 d) 2

Option (c) is the correct answer.

Explanation:

Atomic number of carbon is 6 and its electronic configuration is .

Atomic number of oxygen is 8 and its electronic configuration is .

Atomic number of titanium is 2 and its electronic configuration is .

Atomic number of silicon is 14 and its electronic configuration is .

Therefore, we can conclude that out of the given options all the 4 elements have 2 unpaired electrons in the ground state.

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.