The mass number of a nucleus is
A). Always less than its atomic number
B). Always more than its atomic number
C). Always equal to its atomic number
D). Sometimes more and somtimes equal to its atomic number
Sometimes more and somtimes equal to its atomic number
The mass number (A), is the total number of protons and neutrons in an atomic nucleus so sometimes more than and sometimes equal to its atomic number, depends upon no of neutrons.
1. ( The gas used for filling weather balloons is
2. The least preferred technique in the disposal of Municipal Solid Waste is :
3. What is the chemical name for ‘Baking Soda’ ?
5. Major gaseous pollutant of the thermal power station is
7. Which of the following in automobile exhaust can cause cancer?
8. In the study of pollution, SPM?refers to
9. What is the most commonly used Substance in fluorescent tubes?
10. Higher concentration of nitrogen dioxide in atmosphere air causes