molecular is covalent, made of nonmetals. ionic is made of one metal one non metal, one positive one negative.
A molecule is a combination of two or more atoms e.g. 2 Hydrogen atoms & 1 oxygen atom = H20/ water. An atom is a single element. Atomic structure has nothing to do with it whatsoever.
how to classify the atoms and molecules
Nitrogen has a diatomic molecule (N2).
SiF4 is a polar covalent compound
ammonium sulfate is a compound not an element and therefore has no atomic number. Perhaps you were thinking of molecular weight. But that is a totally different concept.
Yes iodine is an element. It has a reserved place in the periodic table with an atomic number 53. This means the number of protons within the nucleus of iodine will be 53. This is usually not in atomic state. It will be in diatomic ie molecular state.
As a metal it is atomic.
atomic
oxygen is an element not a molecular compound as a molecular compounds are chemically combined and are of more then one element.
Nitrogen has a diatomic molecule (N2).
to classify the elements mendeleev arranged the elements in increasing order of their atomic mass
No. It is a Atomic element because it exist in nature with single atoms as their basic unit.
SiF4 is a polar covalent compound
Sulfur is a chemical element.
they are made up of the same element.
Atomic mass of an element measures the mass of that element on a molecular scale, taking into account neutrons and protons, which weigh approximately 1. Electrons are negated. Atomic mass is also the mass, in grams, of 1 mole of that element.
Aluminum is a metallic element. It doesn't form molecules. Its atomic mass is 27u.
Atoms with the same atomic number are all atoms of the same element. However, if the atoms have different molecular weights, they are isotopes of the same element.
ammonium sulfate is a compound not an element and therefore has no atomic number. Perhaps you were thinking of molecular weight. But that is a totally different concept.