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Answered 2013-01-06 09:11:20

The elements are arranged in the increasing order of their atomic number and repeating periodic properties.

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What is the order of elements in the periodic table based on?

The elements of the periodic table were put in a specific order based off of the increasing atomic mass. The periodic table we use today has the elements arranged according to their increasing atomic numbers.

Why is the word periodic applied to the table of elements?

it is used because periodic means recurring in a pattern or order. The elements are put into order of mass.

Who put the periodic table in order?

The Periodic Table was put together by a Russian college professer named Dmitri Mendeleev. He did it to help his students remember the elements that were on the table at the time.

What is meant by a group of elements?

It is meant some of the elements in the periodic table put into a group! The vertical columns in the periodic table are called groups

How any elements are in the periodic table?

I know that there are over a hundred but you can't always say because when more elements are discovered they are put on the periodic table on the standard table there are 118,

How is today's periodic table put together?

in ascending order by atomic number (number of protons) of an atom of a particular element. previously, the periodic table had elements ordered by atomic mass.

Why are brass and bronze not on the periodic table?

Because they are not elements. They are combinations of different elements put together.

Why was magnesium put 12th on the periodic table?

Because magnesium atoms have 12 protons in their nuclei, which means that the atomic number of magnesium is 12. The elements on the periodic table are arranged in order of atomic number.

How did people decide which elements to put where on the periodic table?

the elements are arranged in the modern periodic table according to the increasing atomic number and in addition, elements in the same group have the same number of valence electrons

Why was the periodic table put together?

wwhy was the periodic table put together? The Periodic Table is very helpful to chemists, physicists, and other scientists because it helps to categorize the behavior of the elements in the table. For example, you can expect elements with the same number of protons in the nucleus of an atom to behave in similar ways. Thus, elements with the same number of protons are kept in the same column of the table. Nice!

What was true about the elements that would later be put in those gaps?

When Mendeleev proposed his periodic table, he noted gaps in the table, and ... Initial versions of the periodic table did not give the rare earth elements the ... that these atomic elements would be discovered, that he included them in later.

How did Dmitri Mendeleev figure out how to put the first periodic table together?

The first periodic table was put in order of atomic mass, not atomic number.

How is the periodic table grouped?

the periodic table is grouped according to similarities. when Mendeleev grouped his first periodic table they followed a pattern. any elements that contained similarities they were all put into the same column.

How do scientist decide were an element belongs on thew periodic table?

the scientists decide where the elements go on the periodic table by how reactive the substance is. the elements of an atomic number greater than 92, are all radioactive. so all the radioactive elements are put on the periodic table after the atomic number "92"

Why are there more elements on the periodic table?

this put elementswith similar chemical properties in columns

How did the periodic table come to be and why are the elements the way they are?

The Periodic table of elements was created by a Russian scientist named Dmitry Ivanovich Mendeleev. When he created it in 1869 not a lot of elements had been discovered. He put the table together using the elements atomic number. Hydrogen for example is first on the periodic table because it's atomic number is one. When he completed it there were a lot of gaps. What Dmitry did was he actually predicted the existence of other elements where the gaps were on the periodic table. A lot of the elements have been found but a few are still 'unobserved'. The periodic table is set out using it's atomic number. There is also the AMU which is the atomic mass unit but it does not have much to do with the set out of the periodic table.

What is a element and a compound?

elements are found on the periodic table compounds are two or more elements put together to make a compound

Why did Mendeleev leave gaps in his periodic table?

At the time the periodic table was first devised, there were many elements that had not yet been discovered. Their existence could be inferred, but they couldn't actually be put into the table until they were discovered.When the periodic table was first devised, there were lots of elements that had not been discovered yet.

Why are the elements on the periodic table separated into periods?

They are put into periods based on their number of electron shells.

Why is thallium placed on the periodic table?

Thallium is placed on the periodic table because all elements are put there. If you meant where is thallium placed it is element 81, group 13, period 6.

What are the radioactive element in the periodic table?

This is hard to answer.All elements have radioactive isotopes.Some elements have no known stable isotopes.It might be more instructive to put the periodic table aside and look at a table of nuclides instead. There's a link to one in the Related Links section.

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