When both –nh2 and –cooh replace hydrogen atoms on the same carbon atom, a(n) is formed. a. amine c. carboxylic acid b. amino acid d. carbohydrate

represents amine functional group and represents carboxylic acid functional group. When these both functional groups are substituted onto a single carbon atom, then amino acid is formed.

The organic compound consists of functional group and functional group with a side chain is said to be an amino acid.

A: amine group is .

C: carboxylic acid  group is

B: amino acid represents functional group and functional group which are substituted onto a single carbon atom.

D: carbohydrate:  the general formula of carbohydrate is .

Hence, amino acid is the correct answer.

out of these options:

ability to burn paper

pure sodium reacting violently with water

the boiling point of water

helium does not tend to react with anything

i would say this is a physical property:

helium does not tend to react with anything

why? :

i said helium does not tend to react with anything because well, it reacts to ! but ability to burn paper, pure sodium reacting violently with water, & the boiling point of water are chemical or

physical properties: the properties of a substance that can be observed without changing the chemical makeup of the substance

chemical properties: properties of a substance relating to the chemical nature and reactivity of the substance

oxygen, selenium, tellurium, and polonium.

they're all from the same group as sulfur (group 16).