ano ang kahulugan ng lathalain?
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s periodic table has 18 vertical columns coups, which are numbered from 1 to 18. called ements of group 1, 2 and 13 to 17 are called group or typical or representative elements. ents s and alkaline earth metals respectively. of group 1 and 2 are also known alkali ements of group 3 to 12 are called transition ents. nthanoids (elements with atomic number 58 to d actinoids (elements with atomic number 90 B) are placed in two separate rows below the dic table in order to avoid the unnecessary ise expansion of the periodic table. is periodic table contains seven horizontal known as periods.
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