 |
Hydrogen is the most abundant chemical substance in the Universe, constituting roughly 75% of all baryonic mass. |
Hydrogen is the chemical element with the symbol H and atomic number 1. |
02/14/2020 18:09:14 |
1.00 |
|
 |
It is a soft, silvery-white alkali metal. |
Lithium is a chemical element with the symbol Li and atomic number 3. |
02/14/2020 18:09:14 |
1.08 |
|
 |
It is a soft, silvery-white, highly reactive metal. |
Sodium is a chemical element with the symbol Na and atomic number 11. |
02/14/2020 18:09:15 |
1.14 |
|
 |
Potassium is a silvery-white metal that is soft enough to be cut with a knife with little force. |
Potassium is a chemical element with the symbol K and atomic number 19. |
02/14/2020 18:09:15 |
1.14 |
|
 |
Caesium has physical and chemical properties similar to those of rubidium and potassium. |
Caesium is a chemical element with the symbol Cs and atomic number 55. |
02/14/2020 18:09:15 |
1.14 |
|
 |
It is commonly known as quicksilver and was formerly named hydrargyrum. |
Mercury is a chemical element with the symbol Hg and atomic number 80. |
02/14/2020 18:09:16 |
1.14 |
|
 |
It is a gray post-transition metal that is not found free in nature. |
Thallium is a chemical element with the symbol Tl and atomic number 81. |
02/14/2020 18:09:16 |
1.14 |
|
 |
Lead is soft and malleable, and also has a relatively low melting point. |
Lead is a chemical element with the symbol Pb (from the Latin plumbum) and atomic number 82. |
02/14/2020 18:09:16 |
1.14 |
|
 |
Elemental bismuth may occur naturally, although its sulfide and oxide form important commercial ores. |
Bismuth is a chemical element with the symbol Bi and atomic number 83. |
02/14/2020 18:09:16 |
1.17 |
|
 |
Polonium was named after Marie Curie's homeland of Poland. |
Polonium is a chemical element with the symbol Po and atomic number 84. |
02/14/2020 18:09:17 |
1.21 |
|
 |
The bulk properties of astatine are not known with any certainty. |
Astatine is a radioactive chemical element with the symbol At and atomic number 85. |
02/14/2020 18:09:17 |
1.21 |
|
