Download App

Atoms and Molecules — Science STD 9 — Question

Gujarat BoardEnglish MediumSTD 9ScienceAtoms and Molecules2 Marks
Question
What do the following abbreviation stand for?
  1. O
  2. 2O
  3. O2
  4. 3O2
✓

Answer

  1. O- One atom of oxygen.
  2. 2O- Two separate atoms of oxygen.
  3. O2- One molecule of oxygen.
  4. 3O2- Three molecules of oxygen.

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→Gujarat Board STD 9 question papers→Gujarat Board question paper generator→

Similar questions

What is green manuring? Give suitable example for green manures.
→
State the various effects of force.
→
What are the quantities on which the amount on which the amount of work done depends? How are they related to work?
→
The velocity of a body of mass 10kg increases from 4m/s to 8m/s when a force acts on it for 2s.
What is the gain in momentum per second?
→
Mention the factors affecting stored grains and describe their preventive measures.
→
What is an octet? How do elements reach an octet? 
→
A pair of bullocks exerts a force of 140N on a plough. The field being ploughed is 15m long. How much work is done in ploughing the length of the field?
→

What are infrasonic waves? Name two animals which produce infrasonic waves.

→

What type of thickening of cell wall does occur in collenchymas?

→
What are (i) ionic compounds, and (ii) molecular compounds? Give two examples of each type of compounds.
→