0
What causes atoms of the same elements to have different atomic masses?
Wiki User
∙ 14y ago
Elements have a certain number of protons(+), neutrons(0) and electrons(-). The atomic number shows the number of protons and electrons in the element (has to have the same number of each to stay stable). The Atomic Mass shows the number of neutrons. For example, Hydrogen has an atomic mass of ~1.01 (and an atomic number of 1). That means that it has 1 electron and 1 proton but no neutron (1 proton+0 neutrons=1). Helium has an atomic mass of ~4.00 (and an atomic number of 2). That means that it has 2 electrons, 2 protons and 2 neutrons (2 protons+2 neutrons=4).
Hope you can understand. :S
Wiki User
∙ 13y ago
Wiki User
∙ 8y agothe mass of an atom is based off of its protons and neutrons together. An atom of an element must have a certain number of protons, but the number of neutrons varies. This affects the mass of atoms of the same element.
Wiki User
∙ 14y agoThis is caused by the number of neutrons in the element and are called isotopes this word means "same place"
Add your answer:
Earn +20 pts
How did Mendeleev arrange chemical elements?
He arranged the elements in the increasing order of their atomic masses and repeating periodic properties.
How are the elements in the first periodic table arranged?
In the first Periodic Table by Mendeleev, he arranged the elements in the increasing order of their atomic masses and repeating properties.
Why the elements are arranged the way that they are?
Elements have different behaviour because of their electronic configuration.
What is the systematic organization of the periodic table?
Elements are arranged in rows and columns. Elements are arranged in order of increasing atomic masses.
Who listed the elements in a table accourding to their atomic masses?
Mandeleev who predicted periodic table.
Do all elements have different atomic masses?
yes
What has different atomic masses?
Different atoms and elements that have different number of protns, neutrons and electrons.Duh!
What do you call atoms of the same element with different atomic masses?
They are called isotopes. They have different mass nmbers because they have a different number of neutrons.
Do uranium isotopes have different atomic masses?
Yes, each isotope has a specific atomic mass; this is correct for all the elements.
Why does the atomic mass of some elements is shown as a decimal value?
Many atoms exist in the form of different isotopes. These have different numbers of neutrons and so their atomic masses are different. The atomic mass for the element is the average of these masses, weighted together according to their abundance.
What did Dimitri Mendeleeve do?
Dmitri arranged the elements in order of increasing atomic masses. He arranged elements in rows and columns according to atomic masses.
Why the mass number of the same atom of an element is not constant?
Since you have isotopes of elements. Isotopes are elements with different number of neutrons hence why the different atomic masses for the same elements.
Where are the isotopes of the same elements having different atomic masses placed in the periodic table?
same slot
When masses combine to form elements with larger masses?
Atomic fusion occurs when masses combine to form elements with larger mass.
How did Mendeleev arrange chemical elements?
He arranged the elements in the increasing order of their atomic masses and repeating periodic properties.
What elements have such small masses that they are not even considered when atomic masses are calculated?
Electrons
How are the atomic numbers and the atomic masses of the elements related to how the elements are arranged on peridoic table?
Elements are arranged in a periodic table by atomic number, lower on top and left. Atomic masses have no direct relationship to the arrangement of atoms, although generally atoms with higher atomic numbers will have higher atomic masses. (There are at least three exceptions for atoms with atomic numbers differing by 1.)
