Download App

Atoms and Molecules — Science STD 9 — Question

Rajasthan BoardEnglish MediumSTD 9ScienceAtoms and Molecules2 Marks
Question
Predict the total number of atoms in case : Aluminium hydroxide.
✓

Answer

Aluminium hydroxide $[Al(OH)_3]:$
There are three hydrogen and oxygen atoms and one atom of aluminum.
Total number of atoms $= 3H + 3O + 1Al$
Hence, there are total $7$ atoms.

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 "Que-Ans (Each of 2 Mark )" from Atoms and Molecules→Atoms and Molecules — all question types→Science STD 9 question papers→Rajasthan Board STD 9 question papers→Rajasthan Board question paper generator→

Similar questions

What will the weight of an object of mass 175kg at the centre of the earth?
→
What type of forces-balanced or unbalanced-act on a rubber ball when we press it between our hands? What effect is produced in the ball?
→
Which molecules are present in chromatin.
→
What is a physical change? Give two examples of physical changes.
→
What is the difference between solutions and colloids?
→
Give two reasons to justify that:
An iron almirah is a solid.
→
What are the metalloids?
→
The nucleus of an atom has 5 protons and 6 neutrons. What would be the:
  1. Atomic number.
  2. Mass number.
  3. The number of electrons.
  4. The number of valence electrons, per atom of this element?
→
On the basis of Thomson’s model of an atom, explain how the atom is neutral as a whole.
→
What is meant by a solution? Give two examples of solutions.
→