ASAP MULTIPLE CHOICE WILL MARK BRAINLIEST What is the composition of an isotope of calcium (atomic number 20)?

19 protons, 20 neutrons, 19 electrons
21 protons, 20 neutrons, 20 electrons
20 protons, 25 neutrons, 20 electrons
22 protons, 20 neutrons, 19 electrons

the leaf is an organ of a typical plant, and the main functions are to complete photosynthesis and allow the plant to exchange gas, just like how we have the respiratory system. leaves have the stomata, which collects maintains co2 and o2 levels. this is necessary for cell metabolism. the leaf also collects sunlight using chloroplasts. succinctly, leaves own a pivotal role in sustaining plant life.

its first and third is your answer i did the qustion the fourth isnt right

that's what i got you can count the number of atoms