s.3 Chem

what do you mean by 磁力?
you mean attracted by a magnet?
you should know magnet only attract to iron
(or somebody said maybe cobalt, nickel, but not all metals)
it's something related to physics and you will learn in F.5

to semi-metals
they are something that have some properties similar to metals
and some properties similar to non-metals
for example
state at room temperature and pressure
- a few solids(e.g. carbon, sulphur), many gases but only one liquid(bromine)
melting and boiling point
- often low
appearance
- usually dull if they are solids
electrical conductivity
- non-conductors except graphite(a kind of carbon)
heat conductivity
- poop conductors
effect of bending and hammering
- brittle if they are solids