The atom of an element has 20 protons, 20 electrons and 20 neutrons:
Name the element.
Hence, the answer is Calcium.
The atom of an element has 20 protons, 20 electrons and 20 neutrons.
What is the atomic number of the element?
Write the electronic configuration of the element.
The atom of an element has 20 protons, 20 electrons, and 20 neutrons:
What is the mass number of the element?
The atom of an element has 20 protons, 20 electrons, and 20 neutrons :
(a) What is the atomic number of the element?
(b) What is the mass number of the element?
(c) Name the element.
(d) Write the electronic configuration of the element.
The atom of an element has 20 protons, 20 neutrons, and 20 electrons. Find out its atomic number.