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Most elements have something called 'Isotopes' which have the same Proton and Electron, but a different Neutron number. So as well as regular C-12, you can get C-14. The Atomic Mass in the Periodic Table takes this into account, and the figure it shows is an average, depending on how abundant each isotope is in a typical sample of that element.
What else can I help you with?
What is the lightest massed metalloid?
That would be boron, with an atomic mass of 10.811.
Is the periodic table organized by atomic numbers?
The Periodic Table is.
Is your modern periodic table based on atomic mass or atomic number?
The modern periodic table is arranged according to the elements' atomic numbers.
What is The first element on the periodic table of elements is hydrogen.?
The elements in the periodic table are arranged according to their atomic numbers, which are the numbers of protons in their atomic nuclei. The atomic number of hydrogen is 1 because it's atoms have one proton, which is why it's the first element in the periodic table.
What is the chart arranged according to atomic numbers?
The periodic table.
How is the periodic table arranged from left to right?
The periodic table is arranged from left to right in the order of atomic numbers.
Does the periodic table gives the mass number of the most common isotopes of an element?
The periodic table give the atomic numbers and the atomic weights of chemical elements.
Elements are organized in the periodic table by their?
Elements are organized in the periodic table by their atomic number, which represents the number of protons in the nucleus of an atom. The atomic number determines the unique properties of each element, and elements with similar properties are grouped together in columns called groups.
Did mosey make a periodic table based off atomic numbers?
Yes, Moseley made a periodic table depending on atomic number. Elements were arranged in order of atomic number.
What are the order of elements on the periodic table based on?
the elements in the modern periodic table are arrange in the increasing order of their atomic numbers.
How are the horizontal rows of the periodic table numbered?
they are numbered by their Atomic numbers
What are the big numbers called on the periodic table?
The big numbers are atomic numbers. They are equal to number of protons. Elements are arranged in order of increasing atomic number.
