- What is the mass number of the isotope of calcium (Ca) containing 20 neutrons?

Discover Questions

How do u find a equation of a parabola that opens to the left whose directrix is x=4 and the distance between the directrix and focus is six? Gluten free mustard? Is it coincidence oldest meteorite on Earth 65 M yrs,found in Scottish Isle & fact Civilization started there.Is it something in air/mineral? Quels sont les constituants élémentaires de adn? Solve for V using integration?