The atomic number of krypton (Kr) is 36, and its mass number is 84. How many neutrons does It have? O A
18
OB
36
Oc.
48
OD
72

Explanation:

We are given with the atomic number (36) which means that we have 36 protons and 36 electrons. Using this information, we can get the number of neutrons. Recall that mass number is equal to the sum of the protons and neutrons in the atomic nucleus. Therefore, there are 48 neutrons in Krypton-84.

c. the scientist provides unbiased information to the government.

the law of conservation of mass states that in a chemical reaction, the total mass of reactants is equal to the total mass of products. because atoms are only rearranged in a chemical reaction, there must be the same number of sodium atoms and chlorine atoms in both the reactants and products