Iodine 131 and iodine 126 are the same in the sense that, they both have the same number of electrons and protons in their atoms, it is only the number of their neutrons that is different. Iodine 131 has 78 neutrons while iodine 126 has 73 neutrons.
Gases
liquids
plasma
solids
condensates <span />
Answer:
Any thing that occupied volume and mass in air is known as matter
Answer:
Density is a measure of the amount of mass that is packed into a specific volume.
Explanation:
Density=mass/volume
Answer:
number of individuals
Explanation:
calculated by dividing the number of people by area
