What type of substance do these statements describe?

- it is a long chain.
- it contains carbon, hydrogen, and oxygen atoms.
- it has double bonds.
- it is insoluble in water.
- it is used for energy storage in living things.

carbohydrate
lipid
monosaccharide
protein

Answer : The correct option is, Lipid.

Explanation :

Carbohydrate : It is the most common type of organic compound. It contain only carbon (C), hydrogen (H), and oxygen (O) atoms.

It is built of small repeating units that form bonds with each other to make a larger

molecule. It is a long chain. It is also used for energy storage in living things.

Generally, all the carbohydrates are soluble in in water.

Lipid : Lipids are organic compounds which contain carbon, hydrogen, and oxygen atoms. It consist of fatty

acids, with or without additional molecules. Fatty acids are the organic molecules that have the general

formula , where 'n' ranges from 2 to 28 and always an even number. It is a long chain.

All the lipids are insoluble in polar solvent like water but are soluble in non-polar solvents. It is also used for energy storage in living things.

Monosaccharide : It is defined as the small repeating units (monomers). A monosaccharide contains carbon, hydrogen, and oxygen.

The general formula for a monosaccharide is, , where n can be any number greater than two. For

example, if n is 6, then the formula can be written as, . This is the formula of glucose. It is soluble in water.

Protein : It is an organic compound which contain carbon, hydrogen, oxygen, nitrogen, and in some

cases sulfur. They are made up of small molecules called amino acids.

All the structures are shown below.

explanation: no but i do not usually comment

assuming that your periodic table has eighteen columns, you should highlight   the four elements in the third column from the left of the table.

neutral atoms of elements after calcium contain d electrons. the energy of d orbitals of a particular main shell lies between the energy of the s and p orbitals of the next main shell. for example, electrons in the have energy higher than those in the orbital while lower than those of the orbital.

by the aufbau principle, electrons fill orbitals one at a time, starting from those of the lowest energy. the orbital is therefore filled right after orbitals and before orbitals.  

potassium has electron configuration and calcium . the s orbital of a main shell holds a maximum of two electrons. the next element would thus have the electron configuration and satisfy the requirements.

a neutral atom of the element contains three electrons on top of the most recent noble gas element. it should thus be placed in the third column of the periodic table. both scandium and yttrium would satisfy the conditions. an aufbau diagram indicates that the 4f orbital is filled before the 5d. however, it appears that exceptions exists for both lanthanum and actinium. neutral atoms of the two d-block elements also demonstrate the and should be highlighted as well.