How is Neon (Ne) and Calcium (Ca) alike and how are they different?

what is the volume occupied by 40 grams of argon gas (ar) at standard conditions? what volume, in liters, is occupied by 1.5 x 1023 

the major pests we deal with are insects, weeds and fungal diseases. a pesticide is a product, whether organic or chemical, used to kill the target pest. there are other techniques gardeners should use that can prevent the severe infestations that make the use of pesticides necessary

it’s previous models   because when i picked that son of a gun’s answer it was wrong look for previous models because they might make it a different letter