Question

1. choose the best answer. which law is also one of daltons postulates? law of chemical reactions law of conservation of mass law of reciprocal proportions law of matter and elements 4) choose the correct scientific notation. which model was used by dalton to describe his atomic theory? clay model plum pudding model nuclear model billiard ball model

Explanation:

• Question 3: Dalton's postulates include the law of conservation of mass. Dalton's atomic theory states that atoms are indivisible and indestructible, and in a chemical reaction, atoms are rearranged. This implies that mass is conserved as atoms are just re - arranged, not created or destroyed.
• Question 4: Dalton used the billiard ball model. He considered atoms as solid, indivisible spheres (like billiard balls). The plum - pudding model was proposed by J.J. Thomson, the nuclear model by Rutherford, and there is no significant use of a clay model in the context of atomic theory development.

Answer:

• 3) law of conservation of mass
• 4) billiard ball model