Which development was the first major change to the ancient models of the solar system? A The placement of the sun at the center of the solar system.

B The placement of some planets closer to the center of the solar system

C The choice to make elliptical rather than circular orbits

D The choice to place stars far from earth

i will give you all the answers just in case  pls mark brainlist

Explanation:

1.the placement of the Sun at the center of the solar system

2.stars are not a part of our solar system

3.The improve telescope showed scientists that the solar system contained comets.

4.the placement of the Sun at the center of the solar system

5.stars that form constellations

answer: c. the experiment shows that the red substance experienced a chemical change.

explanation: chemical change is the change in which chemical composition of the substance changes. physical change is the change in which there is no change in chemical composition.

chemical changes are accompanied by following changes:

a) precipitate formation

b) energy is released or absorbed

c) formation of bubbles

d) change in color

as it is given that the red color has disappeared and there is production of gas, it means the red substance has undergone a chemical change.

e

the electron configuration that you gave me has 16 electrons ergo it has 16 protons ergo it is the element sulfur.