There must be effective collisions between the reacting chemical particles in order for the chemical reaction to occur.
six commonly recognised metalloids are boron, silicon, germanium, arsenic, antimony, and tellurium. Five elements are less frequently so classified: carbon, aluminium, selenium, polonium, and astatine.
I believe the answer is C) both
Hope this helps
Its of-course the inner core <span />
The correct answer is (C) in through the pores and out through the osculum
