Download App

Structure of the Atom — Science STD 9 — Question

Gujarat BoardEnglish MediumSTD 9ScienceStructure of the Atom1 Mark
MCQ
The electron distribution in an aluminium atom is:
  • A
    2, 8, 3.
  • B
    2, 8, 2.
  • C
    8, 2, 3.
  • D
    2, 3, 8.
✓

Answer

  1. 2, 8, 3.

Explanation:

The atomic number of aluminium is 13 and the first shell can have at the most two electrons. Hence, option (a) is correct.

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

The use of ultrasound waves to investigate the action of the heart is called:
→
When water at 0°C freezes to form ice at the same temperature of 0°C, then it:
→
Which of the following is not a characteristic of mixed cropping?
→
Kilowatt is the unit of electrical _______ but kilowatt-hour is the unit of electrical _______:
→
Helium atom has an atomic mass of 4 u and two protons in its nucleus. How many neutrons does it have:
→

The mass of moon is about 0.012 times that of earth and its diameter is about 0.25 times that of earth. The value of G on the moon will be:

  1. Less than that on the earth.
  2. More than that on the earth.
  3. Same as that on the earth.
  4. About one-sixth of that on the earth.
→
Which of the following waves do not require any kind of medium to propagate?
→
Amoeba acquires its food through a process, termed:
→
Which of the following physical quantities has no unit:
→
Which of the following substance cannot be broken down by a chemical method?
→