Answer:
Scientists know that today the Earth's magnetic field is powered by the solidification of the planet's liquid iron core. The cooling and crystallization of the core stirs up the surrounding liquid iron, creating powerful electric currents that generate a magnetic field stretching far out into space.
Cadium
Down a period, atomic radii decrease from left to right due to the increase in the number of protons and electrons across a period.
Crystallization is the process of atoms forming a material with a crystal structure
The position of hydrogen is controversial in periodic table because hydrogen is the only element with out neutron. it belongs to 1 st group but it is not placed there .
Answer:
paper chromatography is an analytical method used to separate colored chemicals or substances.It is primarily used as a teaching tool,having been replaced by other Chromatography methods ,such as thin layer chromatography.
