neutrons pb % pb is stable with neutrons pb % pb is stable with neutrons pb trace y alpha hg beta bi lead (chemical symbol pb, atomic number ) is a soft, heavy metal. bluish white when freshly cut, it tarnishes to dull gray when exposed to air. it is widely available and can be readily converted into...
neutrons pb % pb is stable with neutrons pb % pb is stable with neutrons pb trace y alpha hg beta bi lead (chemical symbol pb, atomic number ) is a soft, heavy metal. bluish white when freshly cut, it tarnishes to dull gray when exposed to air. it is widely available and can be readily converted into...
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micro, small and medium-sized companies (smes) registering their substances under reach benefit from registration fee reductions up to percent. to ensure equal and fair treatment for all registrants, echa needs to verify the eligibility of such fee reductions. we will soon start to verify the company...