Download App

Structure of Atom — Chemistry STD 11 Science — Question

Rajasthan BoardEnglish MediumSTD 11 ScienceChemistryStructure of Atom1 Mark
Question
Write the difference between atomic mass and atomic mass number?
✓

Answer

Atomic mass is the mass of all the sub-atomic particles present in an atom, mainly proton and neutrons as electron have negligible mass. Atomic mass number is equal to sum of number of protons and neutrons.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "1 Marks Question" from Structure of Atom→Structure of Atom — all question types→Chemistry STD 11 Science question papers→Rajasthan Board STD 11 Science question papers→Rajasthan Board question paper generator→

Similar questions

How much copper can be obtained from 100 gm of copper sulphate $\left( CuSO _4\right)$ ?
→
Which of the following statements related to the modern periodic table is incorrect?
  1. The p-block has 6 columns, because a maximum of 6 electrons can occupy all the orbitals in a p-subshell.
  2. The d-block has 8 columns, because a maximum of 8 electrons can occupy all the orbitals in a d-subshell.
  3. Each block contains a number of columns equal to the number of electrons that can occupy that subshell.
  4. The block indicates value of azimuthal quantum number for the last subshell that received electrons in building up the electronic configuration.
→
According to Bohr's model, En of each stationary state is given by the expression:
$\text{E}_\text{n}=\frac{-1312}{\text{n}^2}\text{KJ}/ \text{ mol}^{-1}$
What does 'n' stand for?
→
Electronegativity of F on Pauling scale is 4.0. What is the value on Mulliken's scale.
→
Which is the smallest among Na+, Mg2+, Al3+ and why?
→
How is change in entropy during melting of solid related to its melting point?
→
The first $(\Delta_{1}\text{H}_{1})$ and the second $(\Delta_{1}\text{H}_{1})$ ionization enthalpies (in kJ mol–1) and the $(\Delta_{1}\text{H}_{1})$ electron gain enthalpy (in kJ mol–1) of a few elements are given below:
Elements $\Delta\text{H}_{1}$ $\Delta{\text{H}}_{2}$ $\Delta_{\text{eg}}\text{H}$
I 520 7300 -60
II 419 3051 -48
III 1681 3374 -328
IV 1008 1846 -295
V 2372 5251 +48
VI 738 1451 -40
Which of the above elements is likely to be:
The least reactive element.
→
What is Kc for the following equilibrium when the equilibrium concentration of each substance is:
[SO2]= 0.60M, [O2] = 0.82M and [SO3] = 1.90M?
2SO2(g) + O2(g) ⇌ 2SO3(g)
→
What is the IUPAC name, official name and symbol of the element with atomic number 110?
→
Write IUPAC names of the products obtained by the ozonolysis of the following compound:
1-Phenylbut-1-ene.
→