Coffee is a solution of organic substances in water. is it a mixture or compound

Explanation:

A mixture is a substance that contains two or more components which are mixed together. In a mixture, components does not combine chemically with each other.

For example, coffee mixed in water is a mixture.

Whereas a compound is a substance in which two or more elements in similar composition are chemically combined to each other.

For example, HCl is a compound.

Thus, we can conclude that coffee is a solution of organic substances in water as is it a mixture.

you need to take a look at the periodic system in order to sort these elements into pairs that would most likely exhibit similar chemical properties. first, you need to find elements that are found in the same group (groups are vertical in the periodic system), and then to see whether they have the same valence number. if they meet these criteria, they will have similar properties.

the first pair: ne (neon) and kr (krypton), are noble gases found in group 8

the second pair: li (lithium) and k (potassium), found in group 1

the third pair: s (sulfur) and te (tellurium), found in group 6