Which of the following best describes how further studies supported Joseph Proust's discovery about proportion of elements in wa
ter? Max Planck discovered the Planck's constant.
John Dalton proposed that matter is made of tiny particles.
James Chadwick discovered neutral particles in the nucleus of the atom.
Niels Bohr determined that electrons inhabit distinct energy levels.
Answer is: John Dalton proposed that matter is made of tiny particles.
Proust's law or law of constant composition said that a given chemical compound always contains its component elements in fixed ratio and does not depend on method of preparation.
Water (H₂O) is made of two hydrogen atoms and one oxygen atom:
m(H) : m(O) = 2·1 : 16 = 1: 8.
Dalton said that matter is composed of atoms and atoms of different elements can join to form chemical compound.
Water sticks to the walls of the graduated cylinder, but only on the sides and not the middle. When students look at the surface, the water level is not straight.
A) Nonmetal carbon shares valence electrons with each nonmetal hydrogen forming four covalent bonds.
Explanation:
Methane is formed when nonmetal carbon shares valence electrons with each nonmetal hydrogen forming four covalent bonds. Nonmetals share electrons to form covalent bonds.
