Atom A has 30 protons and 32 neutrons and 30 electrons. Atom B has 30 protons 28 neutrons and 30 electrons. Atoms A and B are ?

Neutral

Explanation:

They have the same # of protons and electrons

first one is the correct answer

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