Atomic Number 5

The periodic table is an arrangment of the chemical elements ordered by atomic number so that periodic properties of the elements (chemical periodicity) are made clear.

Atomic Number 52

Explore the chemical elements through this periodic table

The number of atoms or molecules (n) in a mass (m) of a pure material having atomic or molecular weight (M) is easily computed from the following equation using Avogadro's number (NA = 6.022×10 23 atoms or molecules per gram-mole): M mN n A (1) In some situations, the atomic number density (N), which is the concentration of atoms or molecules per. Boron is the element that is atomic number 5 on the periodic table. It is a metalloid or semimetal that is a lustrous black solid at room temperature and pressure. Here are some interesting facts about boron. Fast Facts: Atomic Number 5.

Group	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18
Period 1	Hydrogen	Helium
2	Lithium	Beryllium	Boron	Carbon	Nitrogen	Oxygen	Fluorine	Neon
3	Sodium	Magnesium	Aluminium	Silicon	Phosphorus	Sulfur	Chlorine	Argon
4	Potassium	Calcium	Scandium	Titanium	Vanadium	Chromium	Manganese	Iron	Cobalt	Nickel	Copper	Zinc	Gallium	Germanium	Arsenic	Selenium	Bromine	Krypton
5	Rubidium	Strontium	Yttrium	Zirconium	Niobium	Molybdenum	Tc☢ Technetium	Ruthenium	Rhodium	Palladium	Silver	Cadmium	Indium	Tin	Antimony	Tellurium	Iodine	Xenon
6	Caesium	Barium	*	Lutetium	Hafnium	Tantalum	Tungsten	Rhenium	Osmium	Iridium	Platinum	Gold	Mercury	Thallium	Lead	Bismuth	Po☢ Polonium	At☢ Astatine	Rn☢ Radon
7	Fr☢ Francium	Ra☢ Radium	**	Lr☢ Lawrencium	Rf☢ Rutherfordium	Db☢ Dubnium	Sg☢ Seaborgium	Bh☢ Bohrium	Hs☢ Hassium	Mt☢ Meitnerium	Ds☢ Darmstadtium	Rg☢ Roentgenium	Cn☢ Copernicium	Nh☢ Nihonium	Fl☢ Flerovium	Mc☢ Moscovium	Lv☢ Livermorium	Ts☢ Tennessine	Og☢ Oganesson
*Lanthanoids			*	Lanthanum	Cerium	Praseodymium	Neodymium	Pm☢ Promethium	Samarium	Europium	Gadolinium	Terbium	Dysprosium	Holmium	Erbium	Thulium	Ytterbium
**Actinoids			**	Ac☢ Actinium	Th☢ Thorium	Pa☢ Protactinium	U☢ Uranium	Np☢ Neptunium	Pu☢ Plutonium	Am☢ Americium	Cm☢ Curium	Bk☢ Berkelium	Cf☢ Californium	Es☢ Einsteinium	Fm☢ Fermium	Md☢ Mendelevium	No☢ Nobelium

Atomic Number 56

The standard form of the periodic table shown here includes periods (shown horizontally) and groups (shown vertically). The properties of elements in groups are similar in some respects to each other.

There is no one single or best structure for the periodic table but by whatever consensus there is, the form used here is very useful and the most common. The periodic table is a masterpiece of organised chemical information and the evolution of chemistry's periodic table into the current form is an astonishing achievement.