Argon has 24 known isotopes.
Answer:
The right answer is "3 g".
Explanation:
Given:
Initial mass substance,

By using the relation between half lives and amount of substances will be:
⇒ 


Thus, the above is the correct answer.
Francium has the largest atomic radius.
Answer:
lava is coming from the crust
Explanation:
volcano's explode with lava because the crust pushes it out