Home › CBSE Class 9 › Chemistry › Alcohols Phenols Ethers › The atomic NUMBER of an element equals the numbe…
The atomic NUMBER of an element equals the number of:
ATotal particles in the nucleus
BElectrons in the outermost shell only
CProtons in the nucleus
DNeutrons in the nucleus
Answer & Solution
Correct answer: C. Protons in the nucleus
Atomic number (Z) = number of protons in the nucleus. It defines what the element is: hydrogen Z = 1, helium Z = 2, …, carbon Z = 6, oxygen Z = 8. A neutral atom also has Z electrons, so for a neutral atom Z also equals the electron count.
Related questions
Besides VSEPR and the Kossel Lewis approach, which two theories are listed?Which theory is abbreviated VSEPR?Why can lattice enthalpy not be calculated directly from attraction and repulsion alone?Ionic bonds form most easily between elements with low ionization enthalpies and high negaWhat is the lattice enthalpy of sodium chloride?Lattice enthalpy is the energy required to separate one mole of an ionic solid into:The structures contributing to a resonance hybrid are called:Why was the concept of resonance introduced?