One element isotope has exactly the same mass number and atomic mass. It was used as the definition of the atomic mass unit (amu). Which element isotope is it and what is its atomic mass?

send me question so i can u

they both have a y in them

plants need sunlight, water, and carbon dioxide to make food. plants use the raw materials of water, nutrients they absorb from soil, and carbon dioxide to make sugars the plant can use. energy from the sun and chlorophyll are also needed.

bcde is the incorrect answer it is a