What are ions? a. atoms with equal numbers of protons and electrons b. electrically charged atoms c. neutral atoms d. small molecules with covalent bonds

b. electrically charged atoms

Explanation:

The charge of the protons is equal in magnitude to the charge of the electron but of the opposite sign. When an atom has the same number of protons and electrons it is called neutral, this means that its charge is neutral (the charge of an atom is the sum of the charge of all electrons and protons). Ions form when a neutral atom gains or loses an electron, and now it has a charge, which is positive if the atom loses an electron or negative if the atom gains electrons.

why do the isotopes of a particular element behave differently in nuclear reactions but the same in chemical reactions? chemical reactions involve changes to electrons in an atom; isotopes do not differ in electrons, and so they react the same way during chemical changes.

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