The reactivities of the halogens decrease down the group ( At < I < Br < Cl < F). This is due to the fact that atomic radius increases in size with an increase of electronic energy levels. This lessens the attraction for valence electrons of other atoms, decreasing reactivity.
The answer is the second option. Lipids make effective cell membranes in living cells because lipids (fats) are not soluble in water. This means that lipids and water do not mix... This lipid bilayer helps to protect the cell.
Answer:
A concentrated solution has a greater amount of dissolved solute than a dilute solution. Explanatio ... More
Answer:four hydrogen atoms
Explanation:
Answer:
Transitional metals are good conductors of both heat and electricity.
But since there aren't any. It could be Calcium.
