a. The symbol
,
,
, ![\tt _{13}^{27}Al^{3+}](https://tex.z-dn.net/?f=%5Ctt%20_%7B13%7D%5E%7B27%7DAl%5E%7B3%2B%7D)
b. Isotope of Na
<h3>Further explanation</h3>
Atomic number=number of protons=number of electrons(neutral atom)
Number of neutrons=mass number-atomic number
Mass number=protons+neutrons
B. atomic number=11, mass number=11+12=23⇒Sodium
![\tt _{11}^{23}Na](https://tex.z-dn.net/?f=%5Ctt%20_%7B11%7D%5E%7B23%7DNa)
C. atomic number=18, mass number=18+22=40⇒Argon
![\tt _{18}^{40}Ar](https://tex.z-dn.net/?f=%5Ctt%20_%7B18%7D%5E%7B40%7DAr)
D. atomic number=15, mass number=15+16=31, charge -3(electron-proton)⇒Phosphor
![\tt _{15}^{31}P^{3-}](https://tex.z-dn.net/?f=%5Ctt%20_%7B15%7D%5E%7B31%7DP%5E%7B3-%7D)
E. atomic number=13, mass number=13+14=27, charge +3(proton-electron)⇒Aluminium
![\tt _{13}^{27}Al^{3+}](https://tex.z-dn.net/?f=%5Ctt%20_%7B13%7D%5E%7B27%7DAl%5E%7B3%2B%7D)
Isotope=the same atomic mass, different neutron(mass number)
So the atom⇒isotope of Sodium(Na)
Answer The N given in the question is normality while the M given in the question designates morality.
Explanation: There are minor differences between both the terms normality and morality given in the question and both are inter convertible.
When one litre of solution is considered when the particles of solute in that litre would show the morality of the solution while when one litre of Solution is considered and equivalent are given then it is known as normality. And copy and paste from google
D. Viral disease
Because it’s a virus that spreads around to other people and need a vaccine to combat it
Answer : The steps for balancing a redox reaction using half reaction method will include the following steps :
1) Write the basic ionic form of the reaction equation.
2) Divide the equation into two separate half reaction which will have oxidation half and reduction half reactions.
3) Balance the atoms present in each half of the reactions except O and H atoms in the reaction.
4) Balance the oxygen atoms in the reduction half of the reaction by the addition of two water molecules in the given conditions of the reaction.
5) Balance the charges present in both the half reactions.
6) The two halves of the equations reduction and oxidation are added to complete the overall reactions. After the addition of two reaction halves, cancel the same number electrons on both sides. The net ionic equation can be written after this step.
7) Finally, Verify whether the equation consists of the same type, number of co-efficients, and charges on both sides of the equation.
Oil and acid separate into there own layers and can not mix with out being forced by something