A, radium-228. Alpha radiation is essentially just two protons and two neutrons leaving the atom, causing the atomic number to drop by two (since the protons left) and the mass number to drop by four (since two neutrons and protons left).
2NH₃(g) + CO₂(g) → CO(NH₂)₂(s) + H₂O(l)
is the balanced equation for the synthesis of urea.
Answer:
The answer is salt
Explanation:
I got it right on the quiz
Heat radiates from the fire and cooks the marshmallow because heat transfer.
I believe the answer is A
Electrons can flow freely in metals.
