Download App

Structure of the Atom — Science STD 9 — Question

Gujarat BoardEnglish MediumSTD 9ScienceStructure of the Atom1 Mark
MCQ
Atomic mass number is sum of number of:
  • A
    Protons and electrons
  • B
    Protons and neutrons
  • C
    Neutrons and electrons
  • D
    None of the above
✓

Answer

  1. Protons and neutrons

Explanation:

Atomic mass number is sum of number of protons and neutrons in an atom of the element.

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 "M.C.Q. [1 M]" from Structure of the Atom→Structure of the Atom — all question types→Science STD 9 question papers→Gujarat Board STD 9 question papers→Gujarat Board question paper generator→

Similar questions

 Work done by a body is:
→

The botanical name if Sunn hemp is:

  1. Crotalaria juncea.
  2. Lens culinaris.
  3. Trifolium alexandrium.
  4. Sesbania aculeate.
→
Symbol of ______ is taken from Greek word Kalium.
→
Main difference between animal cell and plant cell is:
→

The most common type of ground tissue is:

  1. Epidermis.
  2. Collenchymas.
  3. Sclerenchyma.
  4. Parenchyma.
→
If the number of electrons in an ion Z3- is 10, the atomic number of element Z will be:
→

Unicellular organisms take in oxygen and pass out carbon dioxide through:

  1. Diffusion.
  2. Exosmosis.
  3. Endosmosis.
  4. Active transport.
→
The ratio of moles of atoms in 12g of magnesium and 16g of sulphur will be:
  1. 3 : 4
  2. 4 : 3
  3. 1 : 1
  4. 1 : 2
→
The kinetic energy is proportional to temperature, thus evaporation:
→
When a wave travels from the one medium to another, the quality which will not change is its:
→