3
Covalent Bonding
Within the molecule itself, water exhibits ionic bonding. Between the water molecules, there is hydrogen bonding.
covalent bonds
neils Bohr did.
Valence electrons are the parts of the atoms involved It is the electron. As electrons are fermions (1/2 integer spin) they obey the Pauli exclusion principle so that no two electrons can occupy the same energy level. This gives rise to the electrons of different atoms unable to be in the same energy level and this is where the bond comes from. If they could occupy the same energy levels like bosons (eg the photon in laser light) then there would be know chemistry.
Ekasilicon was the first name given to the element germanium. It's atomic mass is 72 and density is 5.5 g/cm. Its bonding power is assumed to be 3.
the atomic mass of ekasilicon is 9.012
Germanium.
Germanium
Ekasilicon was the name appointed by Mendeleev to the undiscovered germanium; germanium has similar chemical properties to silicon and tin.
The atomic mass is 72
we think it is 3
its is a metal (shiny-greyish white)
Dmitri Mendeleev used the property of bonding power when developing his periodic table. Bonding power refers to the number of bonds an element forms during a chemical change. But Mendeleev could not explain bonding power because he didn't know about the structure of atoms. (search Dmitri Mendeleev's periodic table)
Gallium and arsenic because they are ekasilicon's closest neighbors, and would therefore have very similar properties
because precent
Vertical groups are families. Bonding power is based upon the type of bond, the position of element in periodic table.