Which of the following about sodium atoms (Na) is NOT correct?

1. All neutral sodium atoms have 11 protons
and 11 electrons.

2. All sodium atoms have the atomic number
11.

3. All sodium atoms have the same number
of protons.

4. All sodium atoms have 11 neutrons.

5. All atoms with atomic number 11 are
sodium atoms.

c is having 4 valence electrons and is bonded to three hydrogens and one sulphur atom, therefore, the number of bond pair is equal to four. as all the valence electrons are used in forming the bonds so, there is no lone pair left on carbon.

s is having 6 valence electrons and is bonded to one other sulfur atom and one carbon atom, therefore, the number of bond pair is equal to 2. as only two valence electrons are used in forming the bonds so, four electrons are left. therefore, two lone pairs are present on s.

answer: gold foil experiment - he shot alpha particles at a gold foil

explanation: