1. Acid , H+ ion
2. Base , OH- ion
3. Base , OH- ion
4. Acid , H+ ion
The Reactants and the Product
A nucleus of uranium 238 decays by alpha emission to form a daughter nucleus, thorium 234.
<h3>What are isotopes?</h3>
Isotopes are atoms with the same number of protons but differ in numbers of neutrons.
Uranium-238 produces thorium-234 by alpha decay.
An α-particle is a helium nucleus. It contains 2 protons and 2 neutrons, for a mass number of 4.
During α-decay, an atomic nucleus emits an alpha particle. It transforms (or decays) into an atom with an atomic number 2 less and a mass number 4 less.
Thus, uranium-238 decays through α-particle emission to form thorium-234 according to the equation:

Learn more about the isotopes here:
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The answer is C
Because using crocodile skin won’t benefit the environment
Answer:
the 2p5 should have filled up one more so it would be 2p6 ...which assuming it's not an excited electron?