How many neutrons does element x have if its atomic number is 23 and its mass number is 99?

Sugar is dissolved in water. which is the solute? sugar neither both water

An atom of lithium-7 has an equal number of(1) electrons and neutrons(2) electrons and protons(3) positrons and neutrons(4) positrons and protons

Most materials are not magnetic because their magnetism has worn off. their magnetic domains are arranged randomly. they lack magnetic fields. earth’s heat has destroyed their magnetism.