Explanation:
The valence electrons determine the group the elements belong in the periodic table. For example, the element sodium, Na, has a valence electron of one and so it belongs to Group 1 in the periodic table. Another example is Aluminium, Al, which has a valence electron of three and therefore it belongs to Group 3 in the periodic table.
COMPACTION.
Sedimentary rock is a rock formed by layers of sediments settling down together forming one solid rock.
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Tissues. -Groups of similar cells that work together to perform a specific task or function-Blood BLANK is made of simimlar (blood cells) that work together to do a job.
Organ. ...
Organ System. ...
Organism. ...
Robert Hooke. ...
Cell. ...
Vacuole. ...
Golgi Body.
Answer:
i) Nuetrons ii) Nucleus
Explanation:
neutrons do not have a charge and are heavier than a electron and resides in the nucleus at the center of the atom.
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