20 Protons 20 Neutrons
Question: There are _____ naturally occurring elements.
Answer: 92
Question: Which one of the following has negligible mass?
Answer: electron
Question: The number of protons in an uncharged atom _____.
Answer: equals the number of electrons
Question: Consider a hypothetical atom with an atomic number of 4 and a net electronic charge of +1. How many neutrons does this atom have?
Answer: The answer cannot be determined from the information provided.
Question: Isotopes of an element will always differ in _____.
Answer: atomic mass