What are the two types of solids? Explain the difference between them.

Crystalline and amorphous

Explanation:

Amorphous cells offer higher efficiency than the other two. ... Amorphous cells can withstand higher temperatures without output being affected, compared to poly or mono crystalline cells. Amorphous cells perform better in low light conditions compared to even the most efficient monocrystalline panels

- 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

6.4 cm (max) - 25 cm (min)