Show:
basic elements
element categories
HARD elements
easy elements
medium elements
100
beryllium, cesium, and hydrogen
What iare alkiae earth metals?
100
alkalie metals
What contains 7 elements?
100
was Discovered in 1861 by Bunsen and Kirchoff in the mineral lepidolite by use of the spectroscope.
What is rubidium?
100
Atomic Number: 56
What is barium?
100
Atomic Number: 21 Atomic Symbol: Sc
What is scandium
200
was Discovered in 1803 by Tennant in the residue left when crude platinum is dissolved by aqua regia.
What is osium?
200
other metals
What contains 10 elements?
200
Atomic Number: 87 Atomic Radius: 270 pm Atomic Symbol: Fr Melting Point: 27 �C Atomic Weight: 223 Boiling Point: 677 �C Electron Configuration: [Rn]7s1 Oxidation States: 1
What is francium?
200
Atomic Number: 55
What is cesium?
200
Atomic Weight: 22.98977 Boiling Point: 883 �C
What is sodium?
300
Boiling Point: 1749 �C Electron Configuration: [Xe]6s24f145d106p2 Oxidation State: 4, 2
What is lead?
300
alkaie earth metals
What contains 7 elements?
300
Atomic Number: 2 Atomic Radius: 128 pm Atomic Symbol: He Melting Point: <-272.2 �C Atomic Weight: 4.00260 Boiling Point: -268.93 �C Electron Configuration: 1s2 Oxidation States: --
What is helium?
300
Atomic Symbol: O
What is oxygen?
300
Atomic Weight: 192.22
What is iridium?
400
Was discovered in 1774 by Scheele, who thought it contained oxygen. Chlorine was named in 1810 by Davy, who insisted it was an element.
What is Chlorine?
400
non metals
What contains 15 elements?
400
Atomic Number: 83 Atomic Radius: 155 pm Atomic Symbol: Bi Melting Point: 271.4 �C Atomic Weight: 208.9804 Boiling Point: 1564 �C Electron Configuration: [Xe]6s24f145d106p3 Oxidation States: 5, 3
What is bismuth?
400
Atomic Number: 13
What is aluminum?
400
The dioxide (pyrolusite) is used as a depolarizer in dry cells, and is used to "decolorize" glass that is colored green by impurities of iron. Manganese by itself colors glass an amethyst color, and is responsible for the color of true amethyst. The dioxide is also used in the preparation of oxygen and chlorine, and in drying black paints. The permanganate is a powerful oxidizing agent and is used in quantitative analysis and in medicine. is widely distributed throughout the animal kingdom. It is an important trace element and may be essential for utilization of vitamin B1.
What is maganese?
500
Atomic Number: 27 Atomic Symbol: Co
What is colbat?
500
transition metals
What contains forty elements?
500
Atomic Number: 108 Atomic Symbol: Hs Atomic Weight: 265 Electron Configuration: [Rn]7s25f146d6
What is hassium?
500
Atomic Number: 86
What is radon?
500
Atomic Number: 79 Atomic Radius: 144 pm Atomic Symbol: Au Melting Point: 1064.18 �C Atomic Weight: 196.9665 Boiling Point: 2856 �C Electron Configuration: [Xe]6s14f145d10 Oxidation States: 3, 1 (Sanskrit Jval; Anglo-Saxon gold; L. aurum: gold) Known and highly valued from earliest times, gold is found in nature as the free metal and in tellurides; it is very widely distributed and is almost always associated with quartz or pyrite.
What is gold?