Give one property of gold which makes it useful for making jewellery ?
Investigate the speed of diffusion of a drop of ink in water. Put a spot of ink into the middle of a shallow dish of water. You will need to measure time and distance travelled as the ink particles diffuse outwards towards the edge of the dish. Use...
Why do some scientists say that ''Silicon chips are the electronic brains that run the world'' ?
Give one property of gold which makes it useful for coating the ends of some electric connectors.
Which part of the atom has: a. a negative charge? b. a positive charge? c. no charge?
Why all Atoms are electrically neutral?