Question

Which information will be most helpful in determining the atom's identity?; What is the elemental symbol for an atom with 20 protons 21 neutrons and 22 electrons?; What element has 22 protons and 22 neutrons?; What is the mass number of an atom that consists of 20 protons 22 neutrons and 20 electrons?

Answer 1

Answer:20Ca

Step-by-step explanation:

20Ca because the lower number is the atomic number representing the number of protons and.