Regents Chemistry Exam August 2025 Question 31 31  Which element is listed with the number of valence electrons and the number of non-valence electrons in one of its atoms in the ground state? (1)  Sodium has two valence electrons and 11 non-valence electrons. (2)  Phosphorus has five valence electrons and 10 non-valence electrons. (3)  Chlorine has seven valence electrons and 17 non-valence electrons. (4)  Argon has 10 valence electrons and 18 non- valence electrons . Soluti

Regents Chemistry Exam August 2025 Question 30 30 Which nuclear emission has the greatest mass? (1) an alpha particle (2) a beta particle (3) a neutron (4) a positron Solution: Table O on the Reference Table shows all the particles in nuclear chemistry. Mass number is shown to the top right of the symbol. An alpha particle has the highest mass number and is the correct answer. Choice 1. LINKS: Regents Chemistry Guides and Solutions Chemistry Tutoring More Regents Chemistry Pr