A substance that cannot be by
means. An element is composed of
the same number of
in their
into simpler substances
that have
ELEMENTS
omm
Every element has a unique
It indicates the total number of
in the
of the atom Normal atoms are electrically
Every elements is
using a unique
of one
or
letters. The first letter is

it can be observed without changing the identity of the object.

it depends on what substance you're talking about as well as many other factors. in quantum mechanics, the observation of particles affects the observers ability to measure certain properties. for example: you can know the velocity of a particle, but you can't know it's position; or you can know it's position, but not it's velocity. it's like trying to find out where a grain of sand is by throwing other grains of sand at it. once you find out where it is, it's been moved. it's also like trying to find an answer to the question of whether or not a tree falling in a forest makes a sound if nobody is there to hear it. paradoxically, the only way to find out is to be there and hear it.