Question

Professor Birch created a new element called "Dragonium"
that has an atomic number of 20 and a mass number of
30. Which of the following could be the number of electrons
in an isotope of Dragonium?​

Answer 1

Answer:

Number of electrons would be 20

Explanation:

No. of electron is always = atomic number

Answer 2

Answer:

Number of electros = 20

Explanation:

No of electrons= No of protons

=Atomic number