Question

this law was proposed by joseph proust and is known as the law of constant composition. law of conservation of mass law of reciprocal proportions law of multiple proportions law of definite proportions 14. choose the best answer. the positively charged subatomic particle is called a(n) ____. nucleus proton electron 00:28:48

Explanation:

1. The law of constant composition is also known as the law of definite proportions, proposed by Joseph Proust. It states that a given chemical compound always contains its component elements in fixed ratio (by mass).
2. A proton is the positively - charged subatomic particle. The nucleus is the central part of an atom containing protons and neutrons, and an electron is negatively - charged.

Answer:

1. D. law of definite proportions
2. B. proton