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Dark matter may explain <span>unexpected orbital velocities of stars in galaxies.</span>
The elements fluorine and chlorine can form minerals in the "halide"group
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Halide refers to the group containing halogens. The halogens turn out to be less responsive as you go down the group. Fluorine, at the highest point of the group, is the most responsive or reactive halogen. It is to a great degree risky, causing serious synthetic consumes on contact with skin.
Halogens also act as bleaching agents.They will evacuate the shade of colors. Chlorine is utilized to bleach wood mash to influence white paper.
the mass of the object determines the amount of inertia in an object
