A period 3 element is one of the chemical elements in the third row (or period) of
the periodic ... Magnesium is the fourth most common element in the Earth as a
whole ... The free metal burns with ...
I am a member of the boron family and am the “basis of life”. ... I am the ﬁrst
element in the fourth period used 24. I am a ... in making fertilizer. in making paint
The periods are the numbers down the left or right side that count each row,
hence the fourth period is the fourth row down starting from the top row.
FLUORINE - I am a gas with a mass number of 19. 19. POTASSIUM - I am the first
element in the fourth period used in making fertilizer. 22. TIN - You can find me ...
Barium is a reactive metallic element of the alkaline-earth series of metals which
... One of the fascinating properties of bismuth is that it is diamagnetic - it will ....
Alnico, an alloy of nickel, cobalt and aluminum is used to make permanent
magnets. .... The metal is the fourth most abundant element by weight that makes
up the ...
In 1868 the French astronomer Pierre Janssen first detected helium as an
unknown yellow ... Boron nitride can be used to make materials that are as hard
as diamond. ... for its use in gunpowder) and ammonium nitrate, an important
fertilizer. ...... Zinc is the fourth most common metal in use, trailing only iron,
aluminium, and ...
Information about various chemical compounds and elements. ... The alkali
metals have only one valence electron in their highest-energy orbitals (ns<sup>1</sup>). ...
the form water and of organic compounds), making it the 10th most abundant
element. .... Haber process to synthesize ammonia (NH3), which is widely used in
The period in human history beginning in about 1200 B.C. is called the Iron Age.
It was at about this time that humans first learned how to use iron metal. But in
some ways, ... The best known and most widely used alloy of iron is steel. ... Iron
is the fourth most abundant element in the Earth's crust. .... Oct 15, 2015 @ 4:04
Hydrogen is estimated to make up more than 90% of all the atoms or three
quarters .... Janssen obtained the first evidence of helium during the solar eclipse
of ... Helium has the lowest melting point of any element and is widely used in .....
fourth form, known as "white" carbon, is now thought to exist. .... are used as