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Yes, they do. All elements that are different have different molecular weights.
If you will have a look at this Periodic Table, you can see at the bottom of each box the weight (in Atomic Mass units) of each element.
http://www.wisegorilla.com/images/chemstry/0-Periodic%20table.gif
What else can I help you with?
How do atoms differ from elements?
They are different words to describe the same thing. An atom is an element.
Do all elements have the same atomic weight?
No they are all different and even some atoms of the same element have different weights
How do atoms differ from compounds?
An atom is the smallest particle there can be and can't be broken down any further while compounds are composed of two or more different atoms of elements.
Who said this atoms of differnet elements are differnet?
who said this atoms of different elements are different
Do atoms of different elements have a different number of protons?
Yes, atoms of different elements have a different number of protons.
When atoms of the some elements differ in the number of neutrons?
isotopes
Do molecules and atoms have weight?
Atoms are matter, and all matter has mass. In that light, any (and every) atom has mass. Different atoms of different elements have different masses, as you would expect. As atomic numbers increase, the atomic mass of an atom increases, but we also need to account for the different isotopes of different elements. Isotopes are different "configurations" of the same element where there are different numbers of neutrons in the nucleus. This gives rise to different masses for different elements, and also for different isotopes of the elements. There is more to this discussion, and there are other questions here that are already posted and answered. Some of them are linked below.
What are the three main points to John Daltons atomic theory?
All matter is made up of tiny, indivisible particles called atoms. Atoms of the same element are identical in size, mass, and properties, while atoms of different elements differ in these aspects. Chemical reactions involve the rearrangement of atoms, but atoms are neither created nor destroyed in chemical reactions.
Atoms of the same element may differ in their number?
The specific terms atoms and elements are related in The Atomic Number. The Element that an Atom belongs to is determined by the number of Protons that are contained within Its atomic nucleus. The varying number of neutrons [for any given number of protons] that are needed to keep the atomic nucleus held together is what results in the varying Atomic Weight when compared to the Atomic Number.
How do compounds differ from different?
An atom is the smallest particle there can be and can't be broken down any further while compounds are composed of two or more different atoms of elements.
In what way are atoms of one element different from atoms of other elements?
The number of electrons and neutrons may differ for atoms of the same element. However, what distinguishes atoms of one element from those of a different element is the number of protons in the atom's nucleus. All of the atoms of an element have the same number of protons, which is the single most important determiner of the properties of an element.
Do all atoms weight the same?
No, not all atoms weigh the same. The weight of an atom is determined by the combined mass of its protons, neutrons, and electrons. Different elements have different numbers of protons, neutrons, and electrons, leading to variations in atomic weight.
