How many protons Neutrons and electrons does 43 20 Ca have?

Explain the process of fertilization of flowering plants.(indetail)? What is an Euglena Mrs gren? What land forms were created when continent drifted and colided with each other? What does A plaque below railroad signs contains a number that tells? Why was the newton meter for measuring forces named after isaac newton? What is the speed of planets? What is the length of the basilar membrane? Which types of human cells undergo meiosis? Who is the one first measure the year? There are no auroras on Venus because it? What does a sycamore seed look like? What are the differences between folded mountains and shield volcanoes? How old is the solar system in scientific notation? Why a plant does NOT grow in a garden? How hard is a finger nail on the mohs hardness scale? How could one atom become positive and and another become negative? When non metal atoms bond with each other what kind of electron configuration does each nonmetal atom tend to rnd up with? Doña Felisa is an elderly lady who has a deficiency of the hormone insulin which causes the deficiency disease? A greeen plant that produces its own food by the process of photosynthesis? Who is the chief industry of Kenya because of all the many wild animals in the country?