There are two stable isotopes of bromine . Their masses are 78.9183 u and 80.9163 u. If the average atomic mass of bromine is 79.90 u, what is the natural abundance of the lighter isotope

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

gas

explanation:

smoke is the matter of a gas

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