Sodium metal (na) and chlorine gas (cl) are two reactive and dangerous elements. chlorine is a halogen gas that can cause respiratory damage and sodium is an alkali metal that reacts violently with water. what happens to the properties of sodium and chlorine when they react to form sodium chloride (nacl), common table salt? a) the properties of both sodium and chlorine change. b) the properties of both sodium and chlorine remain the same. c) the properties of sodium are different but chlorine remains a dangerous gas. d) the properties of sodium remain the same but the properties of chlorine change.

Me brainliest 1. what does a red shift mean? blue shift? 2. describe the big bang theory. according to this theory, how old is the universe? 3. scientists believe the universe is expanding. what is the evidence that supports this? 4. describe a nebula.5. describe the 3 types of galaxies. what is a barred spiral galaxy? 6. what is a light year? how far is alpha centauri from earth? 7. describe the universal law of gravitation. be sure to include gravitational force between two objects.8. describe the planets’ orbits around the sun.9. what is the asteroid belt? where is it located? 10. describe rotation and revolution of earth. what determines an earth day and year? 11. how do galaxies exist? 12. compare and contrast the inner and outer planets.13. what causes the seasons?