Question

the table lists the properties of various compounds composed of two different elements. properties of ionic and covalent compounds

compound	melting point (k)	boiling point (k)	conducts electricity
2	177	349	n
3	217	195	n
4	825	1,538	y
5	2,845	3,123	y

which lists the elemental composition of the compounds in the table?
1 - metal and nonmetal
2 - two nonmetals
3 - two nonmetals

Explanation:

Ionic compounds, which are typically formed between a metal and a non - metal, have high melting and boiling points and conduct electricity. Covalent compounds, usually formed between two non - metals, have low melting and boiling points and do not conduct electricity. Compound 1, 4, 5 have high melting/boiling points and conduct electricity, so they are likely ionic (metal and non - metal). Compound 2 and 3 have low melting/boiling points and don't conduct electricity, so they are likely covalent (two non - metals).

Answer:

1 - metal and nonmetal
2 - two nonmetals
3 - two nonmetals
4 - metal and nonmetal
5 - metal and nonmetal