Substances that cannot be separated  into simpler substances are

The neutron was discovered by

Which of following does not posses neutron

Table salt is a compound that can be broken down into two elements which are chlorine and

Which neutral atom has 18 electrons in its outer shell?

Which are not deflected by magnetic field

Which do not react chemically with other elements or compounds?

The positive charge in an atom is

Two or more atoms of the same element combine to form molecules of

Elements and Compounds are