First, pick from this list of elements: 0, C, N, Ca, H, P, K, S, Na, CI, Mg, Fe, Zn, SI, Sr, Br Write one paragraph about the discovery of the element you chose.
For some elements, the discovery was pre-historic, so you need to write about the first uses of the elem
For others, there is a story that was recorded.

"a connection, a bond or common feeling between two people", or as a chemical process it stimulates love or sexual attraction

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