the group number represents the valency of the elements.
Atomic number of an element can be found on the periodic table. It is located at the upper left-hand corner of the table.
You can find the Periodic table of Elements in science books. You can also find it online and there is some examples in the related links.
look on the periodic table of the elements
Glass is made of sand, and is not a single element
I'm assuming you mean "how can you find an element on the periodic table?" The periodic table is strategically placed. You can either look for the atomic number (the number at the top-- the number of the protons in one atom), or you can just look for the Element Symbol. The periodic table from left to right is sorted by increasing atomic number. The periodic table from top to bottom is sorted by increasing number of energy levels (the levels in which the electrons are in).
This is a chemical element. You can find the how many electron in a single atom by using a periodic table.
Look it up in "periodic table of elements" You can find the number of a particular element by looking at the Periodic Table; you can also do this by counting the number of protons in the nucleus.
Atomic number of an element can be found on the periodic table. It is located at the upper left-hand corner of the table.
Look on the periodic table of elements. You will find silicon as element 14.
You can find the Periodic table of Elements in science books. You can also find it online and there is some examples in the related links.
The valency of an element refers to the combining power of a given element. The valencies of all the elements is contained in the table of valencies. The valencies of the elements can be obtained by looking at the groups in the periodic table.
look on the periodic table of the elements
octave
In the same column.
Group 17, period 2
Glass is made of sand, and is not a single element
find #26 on the periodic table, Fe, iron