The most abundant element in the Sun and in the stars are hydrogen and helium. Like most of the stars, there is a spontaneous radioactive reaction happening in the Sun. Hydrogen is transformed into Helium. As long as the stars are young, the most abundant element is hydrogen.
<span>During neutralization reaction
Milliequivalent of acid=milliequivalent of base.
Milliequivalent of HCl=0.100*12*1
Milliequivalent of NaOH=M*10*1
So 0.100*12*1=M*10*1
Solve for M.</span>
Answer: a)
b)
c)
Explanation: A neutral compound is to be formed to get a stable compound. The charges have to be balanced , thus the valencies of ions are exchanged and the neutral compounds result.
These all are ionic compounds which result by complete transfer of electrons from metals to non metals.
Answer: A. 2
Explanation: The outermost energy level shell is 4s2.