The table below gives information about the nucleus of each 4 atoms
atom number of protons number of neutrons
a 6 6
d 6 7
g 7 7
e 7 8
how many different elements are represented by the nuclei in the table?
a 1
b 2
c 3
d 4

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

idk i’m struggling too