Abranch of chemistry that deals with the determination of the composition of any substance is:

analytical chemistry
applied chemistry
biochemistry
physical chemistry

What are the similarities of physical and chemical change ?

Which sentence about particles in matter is true? a. atoms are present in solids and liquids but not in gases. b. the particles of matter are in constant motion. c. the same kinds of atoms are found in different elements. d. when a solid changes to a liquid, the sizes of the particles change.

An atom of lithium-7 has an equal number of(1) electrons and neutrons(2) electrons and protons(3) positrons and neutrons(4) positrons and protons