2) Which of the following elements is not part of the atom? O Nucleolus
O Core
OElectron
O Proton

the nucelolo is not part of the atom

Explanation:

The nucleolus is NOT a part of the atom. The nucleolus has its definition in biology as an element of the cell.

Let's remember that the atom is made up of three fundamental elements that are: electrons, protons and neutrons. Protons and neutrons are found in the nucleus while electrons are orbiting around the nucleus.

core

Explanation:

there is no such thing as a core in an atom.

The middle is known as the nucleus

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