Why are solid chemicals never touched with bare hands?

Answer 1

Solid chemicals should be handled using a spatula, tongs, or similar tool for two reasons:

1) So you don't get hurt if the chemicals are dangerous or cause damage to the skin (such as acids and bases). There are some chemicals that are highly reactive with water - such as sodium - that can explode or combust when they mix with the moisture in the skin.

2) So you don't contaminate the chemicals with the moisture, oils and dirt from your hands.

Note that this is also the case with liquid chemicals. You should always avoid touching chemicals of any kind with your bare hands. Always wear protective gloves - This is a safety precaution, NOT a substitute for using the appropriate tools.

For more information, see the Related Questions to the left.

Answer 2

any radioactive substance that emits either beta or gamma radiation, with beta being worse. alpha radiation is fine unless it is placed in the body (either by swallowing, or it being put into you via a cut or similar), in which case, most people with a substance emitting alpha radiation inside them, die