Question

19 multiple choice 1 point what charge do protons have? positive neutral it varies negative 20 multiple choice 1 point which of the following is a chemical change? boiling salt water mixing salt into water burning wood cutting a piece of wood

Explanation:

Protons are sub - atomic particles with a positive charge. A chemical change results in the formation of a new substance. Burning wool is a chemical change as it involves a chemical reaction that changes the nature of wool, while boiling salt water, mixing salt into water, and cutting wood are physical changes.

Answer:

1. A. Positive
2. C. Burning wool