Mendeleev saw trends in the physical and chemical properties of elements when he organized them by

Mendeleev saw the properties of the elements repeated in an orderly way when he organized them according to increasing atomic mass. Mendeleev was als the first one who successfully arranged the elements in the periodic table and this is what we have been using today.

the food using pesticides in the future will harm you by giving you diseases like cancer or something since they have things that we should not eat in it like chemicals or pesticides. that is why organic food is more expensive because they take the time to make it right and healthy for you to eat.

explanation:

let that person have a turn to speak : )