Choose the three factors which are considered when deciding whether to extract a metal from its ore.
a. How easy it is to extract the metal from its ore.
b. How much metal the ore contains.
C. The reactivity of the metal.
d. The melting point of the metal.
e. The changing demands for a particular metal.
.
f. The colour of the metal ore.
I need help now pleasee

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