Which of the following measurements is used to compare the distance between objects in the solar system? a. less than one hundred stars arranged in a spherical shape b. a few thousand planets arranged in an elliptical shape c. several billion stars arranged in arms spiraling outwards d. several billion planets arranged in arms spiraling outwards

out of these options:

ability to burn paper

pure sodium reacting violently with water

the boiling point of water

helium does not tend to react with anything

i would say this is a physical property:

helium does not tend to react with anything

why? :

i said helium does not tend to react with anything because well, it reacts to ! but ability to burn paper, pure sodium reacting violently with water, & the boiling point of water are chemical or

physical properties: the properties of a substance that can be observed without changing the chemical makeup of the substance

chemical properties: properties of a substance relating to the chemical nature and reactivity of the substance

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