If element x has 15 protons, how many electrons does it have?

Some mining processes involve removal of large areas of earths surface in the mined region this practice causes severe environmental damage by allowing which natural process to accelerate in the affected areas? a.precipitation b.erosion c.migration d.condensation

Ineed a little . why do you think there is a basic difference between the kinds of fertilization most common in aquatic and terrestrial animals?

If it turned out dinosaurs were colorblind, how would this affect some assumptions scientists have made about them?