Question
A neutral atom has 9 electrons and mass number is 19.
What is the number of neutrons in the atom?Solution
Mass number of an atom is defined as the sum of protons and neutrons present in the nucleus. Since, the number of electrons are 9 and the atom is neutrons, therefore number of protons will also be equal to 9. Mass number is equal to protons + neutrons=19. Putting protons as 9, we get number of neutrons as 10. Hence, option B is correct.
Which of the following statements are true regarding the principle of Opportunity Cost?
1. Opportunity cost refers to the cost of the next best a...
In which of the following districts of Uttarakhand Aadi Kailash temple is situated?
Which Organization Manages Foreign Portfolio Investments (FPIs) in India?
Which of these is NOT a dairy product?
Dec 2 is observed as :-
How many Member Countries are there in Association of South East Asian Nations (ASEAN)?
'Nakshatra Sabha,' aimed at promoting astro-tourism, was first held in which Indian city?
What is the theme country for the International Kolkata Book Fair 2018?
May 29th is observed as the
What was the Worker Population Ratio (WPR) for males aged 15 years and above in usual status (ps+ss) during July 2023 – June 2024 as per the PLFS repo...
Relevant for Exams:
