The following four statements about atoms are given. 1. The central region of an atom carries a positive charge. 2. Protons and electrons are found in the nucleus. 3. Protons and electrons have equal mass. 4. The nucleus contains most of the mass of an atom. Which statements are correct?
- A1 and 2
- B1 and 4
- C2 and 3
- D3 and 4