the thing that makes elements different is the fact that they all have different amount of protons, electrons and neutrons. They all, also, have different mass #'s.
two or more different elements
Its made from different elements
The difference is that technetium is radioactive.
The number of protons.
atom and elements are different because one atom makes an element and a element is a pure substance and a atom is a basic particle
two or more different elements
the answer is simple it is that both elements have different masses which makes each formula different
istopes have different numbers of neutrons and most of their elements have several istopes
The atoms of each element have a number of protons that is unique to each element. The number of protons makes one atom different from another.
A compound is made when two ELEMENTS are joined together. We can look at the elements in the periodic table from these elements we get really everything that is around us. Water is a compound made from hydrogen and oxygen. There can be different combinations of the elements as this is what makes new things.
their internal structure makes them behave in a similar way.
They don't have the same elements that make them. Hope it helped. =)