Gram Atomic Mass
Gram Atomic Mass
Atomic Mass: According to Dalton’s, each element has a characteristic atomic mass. But determining the mass of an individual atom was a relatively difficult task due to its very small size. Hence, their relative atomic masses were determined using the laws of chemical combinations and the compounds formed. For this purpose, initially 1/16 of the mass of an atom of naturally occurring oxygen was taken as standard unit because of the following two reasons:
However in 1961, carbon (C- 12 isotope) was chosen as standard reference for measuring atomic masses universally because C-12 isotope of Carbon is the most abundant.
Gram atomic mass is the atomic weight on the periodic table of an element in grams. It is the mass of 1 mole of an element in grams, which is its moalr mass.
Examples of values expressed in Gram atomic mass :
Which isotope of Carbon is chosen as standard reference for measuring atomic masses universally? | |||
| Right Option : B | |||
| View Explanation | |||
Which of the following are correct : (a) Oxygen reacted with a large number of elements and formed compounds. (b) A hydrogen-1 atom has a mass of 2 u (or Da or amu) and its gram atomic mass is 2 grams. (c) A carbon-12 atom is defined as having a mass of 12 u and its gram atomic mass is 12 grams. (d) Sodium has atomic weight of 25 u, so it has a gram atomic mass of 25 grams.
| |||
| Right Option : B | |||
| View Explanation | |||
Which of the following are correct ? (a) A carbon-12 atom is defined as having a mass of 12 u and its gram atomic mass is 12 grams. (b) Sodium has atomic weight of 22.99 u, so it has a gram atomic mass of 22.99 grams.
| |||
| Right Option : C | |||
| View Explanation | |||
Students / Parents Reviews [10]
A marvelous experience with Abhyas. I am glad to share that my ward has achieved more than enough at the Ambala ABHYAS centre. Years have passed on and more and more he has gained. May the centre flourish and develop day by day by the grace of God.
Archit Segal
7thBeing a parent, I saw my daughter improvement in her studies by seeing a good result in all day to day compititive exam TMO, NSO, IEO etc and as well as studies. I have got a fruitful result from my daughter.
Prisha Gupta
8thMy experience with Abhyas is very good. I have learnt many things here like vedic maths and reasoning also. Teachers here first take our doubts and then there are assignments to verify our weak points.
Shivam Rana
7thIt was a good experience with Abhyas Academy. I even faced problems in starting but slowly and steadily overcomed. Especially reasoning classes helped me a lot.
Cheshta
10thMy experience was very good with Abhyas academy. I am studying here from 6th class and I am satisfied by its results in my life. I improved a lot here ahead of school syllabus.
Ayan Ghosh
8thAbhyas Methodology is very good. It is based on according to student and each child manages accordingly to its properly. Methodology has improved the abilities of students to shine them in future.
Manish Kumar
10thMy experience with Abhyas academy is very good. I did not think that my every subject coming here will be so strong. The main thing is that the online tests had made me learn here more things.
Hiya Gupta
8thOne of the best institutes to develope a child interest in studies.Provides SST and English knowledge also unlike other institutes. Teachers are co operative and friendly online tests andPPT develope practical knowledge also.
Aman Kumar Shrivastava
10thI have spent a wonderful time in Abhyas academy. It has made my reasoning more apt, English more stronger and Maths an interesting subject for me. It has given me a habbit of self studying
Yatharthi Sharma
10thIt was good as the experience because as we had come here we had been improved in a such envirnment created here.Extra is taught which is beneficial for future.
