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.
The number of neutrons contained in the nucleus 23892U is...
Thunder is usually heard some seconds after lightning is observed because ...
The most appropriate value of fuse for a kettle rated 220 V, 1.06 kW is ...
A capacitor 8μF is charged to a potential difference of 100V. The energy stored by the capacit...
A beam of light is incident from air to water at an angle of 30o. Find the angle of refraction ...