Explain mendeleev's law about the mendeleev table.

In 1869, Mendeleev came up with the a law that describe the pattern of elements:“when the elements are arranged in order of increasing atomic mass, certain sets of properties recur periodically."

Mendeleev’s law describes the pattern of element in Mendeleev’s table.

why is arctic sea ice important? arctic sea ice keeps the polar regions cool and moderate global climate. sea ice has a bright surface; 80 percent of the sunlight that strikes it is reflected back into space. as sea ice melts in the summer, it exposes the dark ocean surface.