- An atom of an unknown element contains 56 protons, 53 electrons, and has a mass number of
135. Answer the following questions:
- What is the atomic number of this element?
- What is the name and chemical symbol of this element?
- How many neutrons are in the atom?
- What is the charge of this element's ion? Does it form a cation or an anion?
135. Answer the following questions:
- What is the atomic number of this element?
- What is the name and chemical symbol of this element?
- How many neutrons are in the atom?
- What is the charge of this element's ion? Does it form a cation or an anion?