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 country’s space agencies have allowed private companies to conduct tours of the International Space Station?
Simplify:- 100 ÷10-[-2+{-9+(3-6 of 2)}]=.
Which of the following statements is/are incorrect in regards to Mahila Samman Bachat Patra?
1.Women will get a 7.5% interest p.a. for the one-ti...
Which perspective assumes that trade unions play a vital role in protecting workers' rights?
Which of the following statements is/are correct?
(1) Twelfth Schedule deals with the matters of Municipalities.
(2) 74th Constitutional...
The process of globalisation is not handled by which of the following organisations?
Consider the following statements:
(1) Article 21 talks about the protection of life and personal liberty.
(2) Article 21 is a part of t...
Which of the following is/are true about the psychological approach?
I. It is given by Mason Haire.
II. ...
At simple interest, a certain sum of money amounts to ₹1,250 in 2 years and to ₹2,000 in 5 years. Find the rate of interest per annum (rounded off t...
Match the following labour concept with their explanation:
Relevant for Exams:
