Through the process of active transport, materials move across a cell membrane: A.
between areas of equal concentration

B.
from an area of higher concentration to an area of lower concentration

C.
from an area of lower concentration to an area of higher concentration

D.
all of the above

Which of the following statements about hybrid orbitals is or are true? choose all that apply. choose all that apply. under sp2 hybridization, the large lobes point to the vertices of an equilateral triangle. after an atom undergoes sp hybridization there is one unhybridized p orbital on the atom. the angle between the large lobes of sp3 hybrids is 109.5∘

Elements in group 2 are all called alkaline earth metals. what is most similar about the alkaline earth metals?

What type of chemical bond is formed between two atoms of bromine 1. metallic 2. hydrogen 3. ionic 4. covalent