Rain freezes as it hits the ground to form solid water is this a physical change or chemical change? a. Physical change
b. Chemical change

Can someone help me answer this I will give your brainliest

Five students had to answer the question how are elements arranged in a periodic tabledamon: i think the elements are arranged by increasing massflo: i think the elements are arranged according to their properties sienna: i think the elements are arranged by when their discovers kyle: i think the elements are arranged according to how common they areglenda: i don't agree with any of themwho is right

If 1.63 times 10 negative 4 of helium dissolves in 100.0g of water, what is the concentration in parts per million

The difference between the atomic number of an element and the element’s atomic mass is the number of ions.