I need help asssapp pleasee

Explanation:

(I can't help you for your screenshot, sorry! :D)

An oxygen atom with a negative 2 charge will have 2 more electrons than protons. Since the number of protons in oxygen is 8, this gives 10 electrons.

The molar mass of oxygen is known to be 16g/mol, so the other 8 comes from the neutrons.

Hence there are 8 protons, 8 neutrons, 10 electrons, and 16g/mol.

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