Aluminum was discovered in 1825 by Hans Oersted. It has a period number of 3, group number of 13, atomic number of 13, and block number p.
13 protons an easy way to remember what number of protons an element has is APES. A-atomic number, P-protons, E-electrons, S-same, so the atomic number and the numbers of protons and electrons are the same number
The element found in period 2 and group 13 is aluminum. Its atomic number is 13.
Aluminum has its electrons in three different energy levels. Therefore it is in third period. As it has three valence electrons, it is located in group 3.Aluminium is found in group-13. Its period umber is 3. Its atomic number is 13.Aluminium is a metal element. It is in the 13th group of the periodic table. And it belongs to the 3rd period.
The element found in group 13 and in period 2 is Boron (B). It has an atomic number of 5 and is located in the second period and the thirteenth group of the periodic table.
The element belonging to the third group and third period is aluminum (Al). It has an atomic number of 13.
A lot of numbers can be unlucky, depending on which period of time you are asking about, or what background you have. The most common unlucky numbers are 13, 666 (the number of Satan) and 4 - in Greek Mythology, the lucky number was 3 so 4 was an unlucky number.
Barium, atomic number 56, is in group 2 of period VI (six) in the periodic system.
Boron, atomic number 5, is a Group 13 element, in Period 2, in block p.
13 24
the chemical element of atomic number 13, a light silvery-gray metal.
13% = 0.13