Beryllium has four protons in its nucleus. how many neutrons are in beryllium-9? explain how you calculated your answer

The answer to your question is: 5 neutrons

Explanation:

Beryllium has 4 protons

# of neutrons in beryllium-9

Atomic number (Z) = 4 (number of protons)

Mass  number (A) = 9 (number of protons + neutrons)

                          Mass number = number of protons + number of neutrons

                          9   = 4 + number of neutrons

                          neutrons = 9 - 4

                          neutrons = 5

ca has a crystalline lattice with positive ions (since it is a metal, metals are positively charged) and electrons flow freely in its structure since the ca atoms have a large nuclear radius so the electrons are not tightly held, therefore the electrons can flow freely since they are not being highly attracted by the nucleus. moreover, one of the properties of metals are that they are conductors of electricity, thus proving ca is the element.