Answer:
Explanation:
Mechanical digestion involves physically breaking down food substances into smaller particles to more efficiently undergo chemical digestion. The role of chemical digestion is to further degrade the molecular structure of the ingested compounds by digestive enzymes into a form that is absorbable into the bloodstream.
I think the number of protons in the nucleus the number of valence electrons atomic mass...
Rubidium would exhibit the greatest shielding [ effect. ]
+2, because the element has more protons than electrons now
