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Why most of the numbers in the periodic table have a decimal number?
Wiki User
∙ 11y ago
The Atomic Mass is written as a decimal because it is a weighted average of all the different isotopes of the element. For example, Hydrogen comes is isoptopes with atomic masses of 1 (1 proton), 2 (1 proton, 1 neutron), and 3 ( 1 proton, 2 neutrons). However, the vast majority of hydrogen atoms contain only one proton, so hydrogen is assigned an atomic mass of 1.00795.
Wiki User
∙ 13y ago
Wiki User
∙ 15y agoit is written in decimals ,so that they can be rounded off with the nearest whole number.
Wiki User
∙ 11y agoThe decimal number in the PTOE is the atomic mass, it is the number of protons and neutrons in the atom. The decimal is the average mass of all the isotopes (different forms) of that element.
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What does row numbers mean?
The number of period in periodic table.
In the periodic table the elements are arranged in order of increasing?
In modern periodic table, elements are listed by increasing atomic number.
What are the elements in the periodic table based on?
Atomic Number
How does the periodic table indicate the numbers of valence electrons an element has?
By the group number of the A columns
What is the modern periodic table based on?
Modern periodic table is based on modern periodic law which states that physical and chemical properties of elemnts are periodic function of their atomic numbers.
How to tell protons neutrons mass numbers atomic weights from periodic table?
atomic weights is usually the number that has decimal points. so whenever you see a number with decimal point on periodic table, then that is the atomic mass.
What 2 numbers are shown in tye periodic table for each element?
The number above the symbol is the atomic number, or the number of protons in the nucleus of one atom of the element. It is this number by which they organized the periodic table. If this number changes so does the identity of the element. In a balanced atom this number will also be the number of electrons in the electron cloud. The number below is the atomic mass number, or the average number of particles (protons plus neutrons) in the nucleus. Since the number of neutrons can change this number must be given as an average so it may contain a decimal.
Elements are organized in the periodic table by their?
The periodic table is a function of the atomic number.
What does row numbers mean?
The number of period in periodic table.
Where is the period number found on the periodic chart of the elemnts?
Usually at the top ... and classically written in Roman numerals.Yes, there are numbers at the top of a periodic table, although they are for the groups/families on the periodic table. Usually the period numbers are found to the left of the periodic table.
In the periodic table the elements are arranged in order of increasing?
In modern periodic table, elements are listed by increasing atomic number.
Why elements don't have whole numbers?
do you mean the why is the average atomic mass not a whole number? because if that is your question, then the answer is that each element has multipal isotopes and the mass you see on the periodic table is the average of all the isotopes together. So there has to be a decimal on the periodic table of elements
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 number is periodic table arranged by?
Periodic table is arranged by atomic number. elements are arranged in groups and periods.
Is the periodic table organized by atomic numbers?
The Periodic Table is.
What do the numbers at the top of each column stand for in the Periodic Table?
the number of protons
What do the period numbers on the periodic table?
There are 7 periods. These describe number of shells.
