Which contribution added to rutherford's discovery of a positive nucleus?
a: electrons are scattered in an atom.
b: neutrons are inside the nucleus of an atom.
c: atoms of the same element have the same properties.
d: atoms are indivisible.

A: Electrons are scattered in an atom.

Explanation:

Ernest Rutherford performed the gold foil experiment which gave a deeper perspective into what an atom really is. In his experiment, he bombarded a thin gold foil with an alpha particle source.

From the behavior of the alpha particles that associated with the gold foil, a number of conclusions were drawn:

sorry idk the answer well to you i have a explaination

explanation: a formula which shows the arrangement of atoms in the molecule of a compound

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