Which of the following statements is CORRECT?
i...
Which of the following statements is CORRECT?
i. the mass number is equal to the total number of protons and electrons in an atom.
ii. the atomic number is equal to the number of protons in an atom.
iii. the number of electrons in an atom is equal to the total number of protons and neutrons in the nucleus.
i only
ii only
iii only
i and ii only
ii and iii only
Correct answer is B
No explanation has been provided for this answer.
When an atom undergoes a beta decay, the atomic number of the nucleus ...
Which of the following instruments can be used to measure e.m.f. most accurately. ...
The diagram above shows the prism arrangement in a ...
A ball is swung in a horizontal circle of centre O with a constant speed. acceleration? ...
A man will exact the greatest pressure on a bench when he ...
If a sound wave goes from a cold air region to a hot air region, its wavelength will? ...