What is the mass number of an element having 20 neutrons, 15 protons and 15 electrons?
15
30
35
50
Correct answer is C
Mass number = Protons = Neutrons = 15 + 20 = 35
Personality Test Questions and Answers
Quantitative Reasoning Questions and Answers
Data Interpretation Questions and Answers
Situational Judgement Questions and Answers
Nigeria General Knowledge Questions and Answers
Microsoft Office Questions and Answers
Spatial Reasoning Questions and Answers
Verbal Reasoning Questions and Answers
Numerical Reasoning Questions and Answers
Abstract Reasoning Questions and Answers
Logical Reasoning Questions and Answers
Puzzles Questions and Answers
See all