Which answer choice best explains why uranium-238 can be used in power plants to generate electricity?
a) nuclides of uranium-238 decay over time. they release large amounts of energy as their nuclei break apart.
b) nuclides of uranium-238 are extremely stable. they can absorb large amounts of energy without breaking apart, so they rarely need to be replaced
c) because atoms of uranium-238 have many more electrons than protons, they release steady streams of electric current.
d)because atoms of uranium-238 have many more protons than neutrons, they attract large numbers of electrons from the surrounding environment

The correct option is A.

Uranium is a radioactive element, which decays spontaneously. Uranium's decay involves the splitting of the nucleus of uranium, this results in the release of large amount of energy and a new element, which is lighter than uranium. The energy released during this process can be used to generate electricity.

- calcium has greater affinity to bond with electron receptors than hydrogen does and hence, it has the ability to replace hydrogen in most of its compounds.

- lithium has 2 valence electrons in the product because it can make only 1 bond with hydrogen. beryllium has 4 valence electrons in the product because it can only make 2 bonds. it has fewer electrons than neon and can react with electron donors. each hydrogen has 2 valence electrons, the same as helium.

- the covalent bond formed between carbon and hydrogen is polar because carbon is more electronegative than hydrogen and it attracts the bonded electron pair closer to itself, thus giving hydrogen a partial positive charge.

- a hydrogen bond is a relatively weak bond that hydrogen atoms make with the electronegative atoms nitrogen, oxygen or fluorine.

so the best choice is a.) 2 calcium (ca) atoms