Number of Electrons - What are Electrons?
Electrons are tiny, very light particles that have a negative electrical charge. Electrons are negatively charged, circling the nucleus, making it a neutral, orbital particle. Protons are much larger and heavier than electrons and have a positive charge. Electrons are positively charged and located in the nucleus together with the neutrons. Electrons have a charge of +1 and a mass of approximately 1 atomic mass unit (amu).
Number of Electrons - How to find the Atomic Number of an element
Every element has a unique Element Symbol and a unique Atomic Number which can be accessed via the Periodic Table with Atomic Mass. You can also refer to the bottom of this page to an at-a-glance chart of all the elements and their atomic number in numerical order.