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The masses of any two atoms of the same element are not always the same. Atomic Mass (the mass you see on the Periodic Table) is just a weighted average of all of the weights of all of the different isotopes of an element.
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The nuclei of all atoms of a given element always have the same number of what?
The nuclei of all atoms of a given element always have the same number of protons. This number is unique to each element and is known as the element's atomic number.
As the atomic masses of the elements on the periodic table increases what happens to each of the number of atoms in 1 mol of each element?
It is the same. 1 mole is always 23 6.022x10 from wikipedia under "Mole (unit)", "one mole of iron contains the same number of atoms as one mole of gold;" It is the same. 1 mole is always 6.022 x (10 to the 23rd) from wikipedia under "Mole (unit)", "one mole of iron contains the same number of atoms as one mole of gold;"
Substance in which all atoms are alike?
A substance in which all atoms are identical is called an element.
Can an atom of two different elements have the same mass number?
Yes. The mass number is basic to the different elements, even more useful than the atomic number. (Unless it is an isotope. Isotopes have a different amount of neutrons than the basic element atom which makes a difference in mass number too. So, a difference in mass numbers doesn't always mean it is a different element.)
Can atoms of different elements have the same number of protons be from the same element?
No. Each type of atom (element) has its own unique number of protons, which is called the atomic number. Atoms of the same element will always have the same atomic number (number of protons). Atoms of different elements will never have the same atomic number (number of protons).
How is it possible for two different atoms to have the same atomic mass?
They would have to be atoms of the same element, and the same isotope of that element.
Can the atomic mass of individual atoms of an element vary?
The mass of an atom will always remain constant, but various isotopes of the same element may have differing atomic masses. For example, a given hydrogen atom could have a mass of 1 amu, 2 amu, or 3 amu, but it could not switch between them.
When 2 atoms appear to have same atomic mass?
When they are of the same element.
What are atoms with the same atomic number but different mass called?
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.
What Atoms of the same element are alike and?
Atoms of the same element are alike in terms of their number of protons, which determines the element. However, atoms of the same element can differ in the number of neutrons they contain, leading to different isotopes of that element.
What are atoms of the same element have different mass numbers?
Isotopes.Isotopes.
Did John Dalton conclude all atoms of a single element have the same mass?
Not necessarily, because most elements have isotopes, which have slightly different weights. However, atoms of a particular element always have the same number of protons, equal to the atomic number of the element.
Isotopes are atoms of the same element that different numbers of?
Isotopes are atoms of the same element that have different numbers of neutrons in their nuclei. This leads to variations in atomic mass for isotopes of the same element.
The molar mass of an element is equal to?
The element's average atomic mass.
Are all sample of elements are composed of atoms with same atomic mass?
No, different samples of an element can have varying atomic masses due to the presence of isotopes. Isotopes are atoms of the same element with different numbers of neutrons, leading to different atomic masses.
Atoms of the same element with different mass numbers are known as?
Isotopes.
Why is there an average atomic mass?
There is an average atomic mass because all atoms of the same element do not have the same amount of neutrons (isotopes), therefore variations in atomic mass exist. The average atomic mass of an element is the estimated average of all the atoms of the same element, given the average of different isotopes in a scientific sample.
