Question
What are the three groups into which all the elements can be divided? Name two elements belonging to each group.
✓
Answer
All the elements can be divided into following three groups:
- Metals: Iron and copper.
- Non-metals: Carbon and sulphur.
- Metalloids: Boron and silicon.
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
To what height should a box of mass $150$ $kg$ be lifted, so that its potential energy may become $7350$ joules?
$(8=$ $9.8 m / s ^2$ ).
→$(8=$ $9.8 m / s ^2$ ).
A body of mass $100\ kg$ is lifted up by 10m. Find:
→- The amount of work done.
- Potential energy of the body at that height. (value of $g = 10\ m/s$).
Explain why, the tip of a sewing needle is sharp.
The tip of a sewing needle is sharp.
The tip of a sewing needle is sharp.
If $784\ J$ of work was done in lifting a $20\ kg$ mass, calculate the height through which it was lifted. $(8 = 9.8\ m/s^2)$
→Define the term 'work'. Write the formula for the work done on a body when a force acts on the body in the direction of its displacement. Give the meaning of each symbol which occurs in the formula.
State whether the following objects possess kinetic energy, potential energy, or both:
- A man climbing a hill.
- A flying aeroplane.
- A bird running on the ground.
- A ceiling fan in the off position.
- A stretched spring lying on the ground.
A bulb lights up when connected to a battery. State the energy change which takes place:
- In the battery.
- In the bulb.
Give one example each of a body possessing: (i) kinetic energy, and (ii) potential energy.
What is meant by (i) atomic number, and (ii) mass number, of an element? Explain with the help of an example.
You are given two liquids, one a solution and the other a compound. How will you distinguish the solution from the compound?