What is a periodic table in simple words?
The periodic table is a tabular array of the chemical elements organized by atomic number, from the element with the lowest atomic number, hydrogen, to the element with the highest atomic number, oganesson.
Why do they call it a periodic table?
Why is the periodic table called the periodic table? It is called the periodic table because of the way the elements are arranged. You’ll notice they’re in rows and columns. The horizontal rows (which go from left to right) are called ‘periods’ and the vertical columns (going from up to down) are called ‘groups’.
What is period in periodic table?
A period is a horizontal row of the periodic table. There are seven periods in the periodic table, with each one beginning at the far left. A new period begins when a new principal energy level begins filling with electrons. Period 1 has only two elements (hydrogen and helium), while periods 2 and 3 have 8 elements.
What is K on the periodic table?
The name is derived from the english word potash. The chemical symbol K comes from kalium, the Mediaeval Latin for potash, which may have derived from the arabic word qali, meaning alkali. Potassium is a soft, silvery-white metal, member of the alkali group of the periodic chart.
What element starts with the letter K?
The elements of the periodic table sorted by name in an alphabetical list.
| Name chemical element | Symbol | Atomic number |
|---|---|---|
| Platinum | Pt | 78 |
| Plutonium | Pu | 94 |
| Polonium | Po | 84 |
| Potassium | K | 19 |
Is P on the periodic table?
Phosphorus (P), nonmetallic chemical element of the nitrogen family (Group 15 [Va] of the periodic table) that at room temperature is a colourless, semitransparent, soft, waxy solid that glows in the dark.
What does P stand for on the periodic table?
Phosphorus
Why is phosphorus written P4?
Phosphorus can form a P4 white phosphorus tetrahedron because it can form three bonds, while sulfur can only form two bonds. Therefore sulfur forms rings and chains only. The most stable allotrope of phosphorus, red phosphorus, is a cross-linked, polymeric chain of atoms.
What is used in matchstick?
The head of safety matches are made of an oxidizing agent such as potassium chlorate, mixed with sulfur, fillers and glass powder. The side of the box contains red phosphorus, binder and powdered glass.
Where is Red phosphorus used in safety matches?
Red phosphorus replaced white phosphorus in matches because it was much more stable. It is contained in the striking surface of safety matches, not in the match head.
What is the Colour of phosphorus?
white
What is phosphorus commonly used for?
Uses of Phosphorus Phosphorus is used in the manufacture of safety matches (red phosphorus), pyrotechnics and incendiary shells. Phosphorus is also used in steel manufacture and in the production of phosphor bronze. Phosphates are ingredients of some detergents. Phosphorus is used to make light-emitting diodes (LEDs).
Is phosphorus toxic to humans?
White phosphorus is extremely toxic to humans, while other forms of phosphorus are much less toxic.