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Many elements have what are called isotopes. An isotope is a variant of the element and has the same atomic number but a different atomic weight. The number after the name signifies a specific isotope. For example, carbon 14 means that the isotope of carbon that we are talking about has an atomic weight of 14. It has the same atoimic number (6) as any other isotope of carbon, but it has more neutrons in the atom than other isotopes. These others may have 12, or 13.
Uranium is another well-known element with more than one isotope. Uranium 238 is known for its use in atomic poer.
Wiki User
∙ 13y ago
Wiki User
∙ 12y agoIt probably means the number of nucleons (and therefore the approximate mass). If you're talking about, for example, the "235" in "uranium-235", then that's what it is.
If you're talking about the "2" in H2O, though, it means the number of H atoms in the molecule.
Those are the two most likely cases I can think of. If you were thinking of something else, you'd need to ask a more specific question (an example similar to the ones given above wouldn't hurt).
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How did organic compounds get their name?
The prefix is the number of carbon atoms the suffix is the amount of hydrogen atoms compared to the carbon atoms
Every balanced chemical equation each side has the same number of?
same number of each element
The number of atoms in 1.5 mol of carbon?
To find atoms in number of moles you multiply by avogadra's number (6.022x10^23) then multiply by the number of atoms, in this case it is one because carbon is a monotomic element. The answer is 9.03x10^23 atoms C
How many potassium atoms are in the reactants of the chemical reaction?
The same number you started with. In every chemical reaction the total number of atoms at the start is the same as the number of atoms at the end.
How many number of atoms are in 0.40 mole of sulfur?
The number of atoms in 0.40 mole of ANY element or compound is: 0.40 mol x 6.022x1023 atoms/mol = 2.4x1023 atoms.
What does avogadro's number signify?
It is the number of particles - atoms or molecules - that are present in 1 mole of the element or compound.
What is the name for the number of protons and neutrons in atoms and elements?
mass number
What is the name of the number used to identify atoms of elements?
The atomic number.
What is the name of number of protons in the atoms of an element?
The number of protons in an atom is its atomic number.
How did organic compounds get their name?
The prefix is the number of carbon atoms the suffix is the amount of hydrogen atoms compared to the carbon atoms
What does a name signify?
Turkiye
What does the number 15.999 signify?
43
What is the name of the atoms that have the same number of protons and different number of nuetrons?
They are called isotopes.
What does the name John signify?
toilets
What does the number 10 mean to God?
The number 10 signify completeness
What does 'bar' signify in a name such as bartimeus?
SON OF
What is the name of a number in front of a chemical formula in an equation called?
This is the number of molecules or atoms involved in the reaction.
