C: Sodium
<span>this element must be stored in oil because of its reactivity.
The rest of them don't have to be stored in oil.</span>
Answer: D.
Explanation: Females have XX chromosomes while males have XY
In a neutral atom they are both equal, and their even quantities makes the atom neutral...
Answer:
Explanation:
The melting of the chocolate pieces one by one showed that it was caused by heat flowing through the foil bridge. The transfer of heat happened between the foil bridge and the chocolate pieces because they were touching each other.