gosh i rly need help in the previous questions I asked and no one answered I wish I was smart to answer them alone why am I d. umb

Asingle atom of an element has 21 neutrons, 20 electrons, and 20 protons. which element is it? ok o z

1. list three scientific reasons cockroaches may fly.

The characteristic of two different types of reactions are shown below. reaction a: electrons are gained by the atoms of an element. reaction b: protons are lost by the atom of and element. which statement is true about the atoms of the elements that participate in the two reactions? a: their identity changes in both reaction a and b. b: their identity changes in reaction a but not b. c: their identity changes in reaction b but not a. d: their identity remains the same.