After two half-lives, the amount of radioactive substance remaining will be
A 25% of the initial parent nuclei.
B 75% of the initial parent nuclei.
C 50% of the initial parent nuclei.
D 25% of the daughter nuclei

A 25% of the initial parent nuclei.

Explanation:

One half life, you get 50%, two half lives you get 25% and you just keep dividing by 2 from there. :) Good luck my friend!

answer: your mm

explanation:

b. acid is the correct answer @jayxboof all social media

acid : acids are those which accepts an electron-pairs.

base : bases are those which donates ab electron-pairs.

alkali : it is a base that dissolves in water. it is basically a base and the ph greater than 7.

hydroxide ion : it is a poly-atomic ion which is negatively charged.