ExamPlay Dark Logo
تسجيل الدخول

WAEC - Chemistry (2005 - No. 2)

What is the mass number of an element having 20 neutrons, 15 protons and 15 electrons?
15
30
35
50

توضيح

Mass number = Protons = Neutrons = 15 + 20 = 35

تعليقات (0)

تسجيل الدخول للتعليق
إعلان
BrainBehindX Inc Logo
©2026; مدعوم من BrainBehindX Inc