0
The decimal is the average Atomic Mass of an element.
Each element has a set of isotopes which have different numbers of neutrons and therefore different atomic masses.
For example there are 3 isotopes of carbon. with masses of 12, 13 and 14, though carbon-12 is the most common by far. But because of the two heavier isotopes the average mass is 12.011 rather than just 12.
What else can I help you with?
What are some ways that elements are arranged on the periodic table of elements?
Mendeleev arranged the elements in a table in the increasing order of atomic masses and repeating periodic properties. In the modern long-form of periodic table, the elements are arranged in the increasing order of atomic number and repeating periodic properties.
Why the atomic mass numbers listed for elements on the Periodic Table are not whole numbers.?
Why are atomic masses of elements not generally whole numbers? The atomic masses listed on the periodic table are a weighted AVERAGE of an element'sisotopes. ... An element's atomic number is the number of protons in its nucleus. Number of protons specifies atom type.
What is the basis of arranging the elements in the periodic table?
Elements in the periodic table are arranged based on their atomic number, which represents the number of protons in the nucleus of an atom. This arrangement helps to group elements with similar properties together in periods and groups.
What three facts about the elements can be derived from the periodic table?
You can find out what groups certain elements are in, and find there relative atomic masses. You can also find outy how reacticve they aRE AND HOW MANY ELECTRONS NEUTRONS AND PROTONS ARE IN CERTAIN ELEMENTS
Which statement best explains why most atomic masses on the periodric table are decimal numbers?
Most atomic masses on the periodic table are decimal numbers because they are weighted averages of the masses of all isotopes of an element, taking into account their relative abundance. Since isotopes have different masses, the atomic mass is typically not a whole number.
How were the atomic number and the atomic masses of the elements determined?
Atomic masses are determined by mass spectrometry. The atomic number is identic with the number of protons in the atom - depends on position in the periodic table.
What are some ways that elements are arranged on the periodic table of elements?
Mendeleev arranged the elements in a table in the increasing order of atomic masses and repeating periodic properties. In the modern long-form of periodic table, the elements are arranged in the increasing order of atomic number and repeating periodic properties.
Why the atomic mass numbers listed for elements on the Periodic Table are not whole numbers.?
Why are atomic masses of elements not generally whole numbers? The atomic masses listed on the periodic table are a weighted AVERAGE of an element'sisotopes. ... An element's atomic number is the number of protons in its nucleus. Number of protons specifies atom type.
What is the basis of arranging the elements in the periodic table?
Elements in the periodic table are arranged based on their atomic number, which represents the number of protons in the nucleus of an atom. This arrangement helps to group elements with similar properties together in periods and groups.
State the periodic law on which Mendeleev's Periodic table was based and why and how this periodic law changed?
Mendeleev's Periodic Table was based on the periodic law which states that the properties of elements are a periodic function of their atomic masses. This law changed with the discovery of atomic number by Moseley which stated that the properties of elements are a periodic function of their atomic numbers, leading to a more accurate and modern periodic table based on atomic number.
What does a periodic table have?
a modern periodic table should have the 118 elements, their atomic numbers, and their masses. to find the number of protons and electrons, they are the same as the atomic number. to find the neutrons, subtract the protons from the mass.
How are elements are arranged on periodic table?
Dmitri Mendeleev and Lothar Meyer first arranged the elements in the increasing order of atomic masses. Bohr and Henry Moseley then arranged the elements in the increasing order of atomic number.
How are the elements arranged?
Elements are arranged on the periodic table based on their atomic number, which is the number of protons in their nucleus. This arrangement groups elements with similar properties in columns called groups or families, while elements in the same period have the same number of electron shells.
Why did they number elements on periodic table?
No one give number to elements in periodic table. they have been calculated
Where are the isotopes of the same elements having different atomic masses placed in the periodic table?
Isotopes of the same element with different atomic masses are placed in the same position on the periodic table because they have the same number of protons and electrons. The atomic number, which determines an element's position on the periodic table, is the same for all isotopes of an element.
How do you find protons in elements on the periodic table?
It's the same as the Atomic number, which is the number on an element that usually has no decimal, and is the first number listed. Same goes for electrons.
What three facts about the elements can be derived from the periodic table?
You can find out what groups certain elements are in, and find there relative atomic masses. You can also find outy how reacticve they aRE AND HOW MANY ELECTRONS NEUTRONS AND PROTONS ARE IN CERTAIN ELEMENTS
