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Answered 2011-03-19 02:18:07

The first row of the periodic table contains two elements.

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Nitrogen can be found in the 1st period of group 15 elements in the periodic table.

If you are looking at the proper periodic table, there aren't any man made elements.

He created the first rational and quasi-complete (with the chemical elements known during his life) periodic table.

In the periodic table only elements are placed in groups and periods. Butane is NOT an element but a compound: C4H10, made of two elements: the 1st Hydrogen and the 6th Carbon.

The first twenty elements are made up f different things

Because there are only two elements with neutral charge that have one energy level.

The elements of the 1st GROUP of the periodic table are called alkali metals. The elements of the 17th GROUP of the periodic table are called halogens. Alkali metals are soft metals whereas halogens are non-metals.

You should try looking at a periodic table first. Sodium will appear with the symbol Na and it is in the 3rd row of the 1st group (the alkali metals) Atomic number 11

the first element is hydrogen in periodic table. It is placed at the top.

On the Periodic Table of the Elements, Hydrogen is found in Group 1, Period 1 (in the upper left corner of the table). Hydrogen is the only nonmetal found on the left side of the Periodic Table.Hydrogen ( H) atomic number is 1subshell electronic configuration is 1s1Block = s blockPeriod = 1stGroup = 1st

The periodic table orders elements by its number of protons. The 1st element has 1 proton, the 2nd has 2, and so on. Furthermore, elements with similar characteristics are grouped vertically. These elements(1A-8A) have the same number of electrons in their outer shell, so react similary. Elements organized horizontally have progressively more protons and electrons.

the no. of electron shells in an atom varies for every element in the periodic table, depending on its no. of electrons in the atom. the no. of shells of an atom of an element ca be derived through the period of the periodic table. elements in the 1st period has only 1 shell and so forth.

The most reactive group is alkali metals. It is the 1st group of the periodic table.

hydrogen is an element of the periodic table and has the symbol H. hydrogen has 1 electron and is 1st on the periodic table.

When looked at the periodic table its u will see that each column has a # on the top of the periodic 1 is the 1st column to the left & are the alkaline metals...the last column all the way to the right of periodic table are nobel gases..for example. Transition metals are all the elements in groups # 3-12. (In between where the metals & the non metals locations on the P.T). Hope that helps!

Group 1 of the periodic table is made up of the alkali metals. They have one electron in their valence shells. They explosively react with acids to form their +1 ions.Alkaline metals are in the 1st group. All the elements in the 1st group except Hydrogen are metals. Lithium,Sodium,Potassium are examples.Group I of the periodic table are where the alkali metals are found (on the left-most column of the periodic table). The elements there include lithium, sodium and potassium. These are all reactive metals that react vigorously with water. Their reactivity increases progressively as you descend the group from lithium downwards.

Mendeleev's periodic table was arranged in order of increasing atomic masses, whereas today's modern periodic table is arranged in order of increasing atomic number.

He has the highest 1st ionization energy. Li has the highest 2nd ionization energy. Be has the highest ionization energy.

an elements location on the periodic table tells almost the complete story of every element on the table... electro-negativity, atomic radius, electron affinity, # of electrons, protons, neutrons, atomic weight, and many chemical properties as well. Start by looking at the columns on the periodic table. The 1st column is alkali metals, and all those elements in that column share similar properties. The same is true for the second column, and the last few columns on the right side of the table. There are also "trends" on the table, such as one which says that as you move left to right, and top to bottom on the table the electro-negativity increases. Do some more research on the terms i listed in the first paragraph. Those are the keys to understanding how to predict an elements properties.

It is because the periodic table is arranged such that each period contains all such elements which have their total no. of electrons falling under a particular shell. For example: 1st period only has 2 elements because First shell has a max of 2 electrons and only two elements (Hydrogen and Helium) have their total no. of electrons less than or equal to 2.