Atoms and Molecules long 3 Flashcards
1
Q
What is IUPAC ?
A
The International Union of Pure and Applied Chemistry is an international scientific organization which approves names of elements, symbols and units.
2
Q
What is Atomic Mass ?
A
/ The mass of an atom of a element is known as its
atomic mass.
/ In 1961 IUPAC accepted atomic mass unit (u) to
express atomic and molecular mass of elements
and compounds
3
Q
What is a molecule ?
A
A molecule is a group of two or more atoms that are chemically bonded together and capable of a independent existence.
4
Q
What is one [u]
A
1.66 x 10^-27 Kg
