Which of the following describes the law of conservation of mass? 1. The mass of the products is greater than the mass of the reactants
2. the mass of the reactants is greater than the mass of the products
3. The products will have the same states of matter as the reactants
4. The mass of the products equals the mass of the reactants

c. because step up transformer steps up the input voltage i.e increases the input voltage  

the number of turns are greater on the secondary side of step up transformer  

transformer does not handle dc current

atomic mass = 39

number of neutrons = 20

number of protons= 19

electronic configuration = 1s2 2s2 2p6 3s2 3p6 4s1

the number of electron in first shell = 2

number of electrons in n=3 shell = 8