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-to make room for new elements
-to classify them in terms of their behavior
-for easy recognition of elements
-so the (period) and the (groups) would align
The I2R company (probably best known for making lead donuts; or at least, that's what I mainly remember them for) used to publish calendars (okay, I lied: the calendars are what I mainly remember them for) with different styles of periodic tables. There was, for example, a circular (well, more of a spiral, with spikes) one, and one you were supposed to cut out and fold into a pyramid.
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∙ 14y agopor que esque la crisis esta cabrona
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Which way does electron shells increase on the periodic table?
The number of shells in periodic table increase down the group, i.e., vertically.
Why are nitrogen and phosphorus are both in group 5 in the periodic table?
Because they both have 5 electrons in their outer shell. This is the way that the elements in the periodic table were grouped.
What are the vertical columns on the periodic table calles?
The vertical columns on the periodic table are called groups. The table is arranged in such a way that all elements in the same group are similar and have the same number of valence electrons.
What are the columns on the periodic table called?
http://en.wikipedia.org/wiki/Periodic_tablegroups or families are verticalA period is a horizontal row in the periodic table. Although groups are the most common way of classifying elements, there are some regions of the periodic table where the horizontal trends and similarities in properties are more significant than vertical group trends.
Why did Mendeleev set up the periodic table the way he did?
Because he was creating a book called the Principle of Chemistry and he noticed the pattern in every elment. So he made a table or (chart) called Periodic Table of Elements.
Was the periodic table always been set up the way it is today?
the periodic table is set up by atomic number, obviously. the atomic number is equal to the amount of protons, so the periodic table is set up by amount of proton order. During the time more than 100 versions of the periodic table were proposed. See the link bellow for some details; also the links of this...link.
Will the periodic table always look this way?
In more than 150 years the periodic table had many versions; hundred versions of this table are known. The sole official table is today the IUPAC Periodic Table.
Why is the periodic table arrange the way it is?
The periodic table is arranged by the Atomic Number
How can the periodic table of elements help you learn?
The periodic table is set out in a pattern that provides a great deal of information about the elements. Understanding the way the table is structured will help to understand how elements will behave and react. A study of the patterns will be a great aid in learning about chemicals and why they work in the way they do.
Why is the table of elements known as the periodic table?
Simply, the periodic table is set up by listing elements by their atomic number, or the number of protons in an atom's nucleus.
Which is the statement of the periodic table?
The basic idea is that when arranged in a certain way (the way presented in the periodic table), elements in the same column tend to have similar properties.
Who inruduce the periodic table of elements?
Dmitri Mendeleev, a Russian scientist of the 19th century, is credited with organizing the periodic table the way we know it today. We have made minor changes to his arrangement over the years (and added a bunch more elements!) but the way he put it together still works.
Which way does electron shells increase on the periodic table?
The number of shells in periodic table increase down the group, i.e., vertically.
What is the periodic table of elements and how are the elements arranged?
by their atomic number
Why was mendeleev's periodic table valid at all?
His table was sorted by atomic mass, not atomic number. (the way today's periodic table is sorted) Mendeleev was almost right, but they did not know about protons at the time. (atomic number is the number of protons in an element) There would have been absolutely no way of him figuring out they were related to atomic number if he didn't even know about atomic number
Are more than three-fourths of the elements in the periodic table non-metals?
No it is the other way around. The majority of elements in the periodic table are metals.
How did mendeleev organize the periodic table?
He is credited as being the creator of the first version of the periodic table of elements. Using the table, he predicted the properties of elements yet to be discovered.
