Why is it advisable to wear long sleeves when students work in a chemistry lab? to provide warmth near the lab refrigerator to protect the arms from lab chemicals to minimize burns from hot water at the lab sink to prevent burns when using a bunsen burner

It  is  advisable  to  wear  long  sleeve  when  when  a  student   is  working   in  a  chemistry  lab so   that   to  protect  arms   from  lab  chemicals. when   someone  enter  the  chemistry  lab  to  wort  or  to  study  should  be  well  prepared  with  appropriate  gears   and  security  measure   to  avoid   injury.

The correct answer should be "electrons orbit the nucleus in circular motions exactly as shown on the classic bohr model."