Plz ! i'll give brainliest to whoever answers this along with 15 points!

talc
(asphalt)
gypsum
(fingernail)
calcite
(copper coin)
fluorite
apatite
(knife blade)
feldspar
(steel file)
quartz
topaz
corundum
diamond

which of the substances listed above are pure elements?

I would say diamond, because it consists only of carbon

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

so she was walking and she stepped on warm jeffy , uh uh uhh dadye i just pooped my pants