Identify the correct charge of each atomic particle

a. electron=positive; proton=negative; neutron=no charge

b. electron=negative; proton=positive; neutron=no charge

c. electron=no charge; proton=negative; neutron=positive

d. electron=negative; proton=no charge ; neutron=positive

Answer : The correct option is, (B) Electron = negative, proton = positive, neutron = no charge

Explanation :

As we know that an atom is the smallest unit of a matter that consist of three subatomic particles which are electrons, protons and neutrons.

The protons and the neutrons are located inside the nucleus or center of the nucleus where the mass of the an atom is concentrated and the electrons are located around the nucleus.

The protons are positively charged, the electrons are negatively charged and the neutrons are neutral that means it has no charge.

Hence, the correct option is, (B) Electron = negative, proton = positive, neutron = no charge

c. heat could easily travel through the molecules in the air and escape/enter the flask. removing the air slows down the heat transfer.  

dynamic equilibrium is the answer.