What fundamental particle is found in the nucleus of an atom and has a positive charge?

Which scientist is known for the first comprehensive atomic theory in the early 19th century?

What term describes the central part of an atom, which contains protons and neutrons?

Which subatomic particle has a negative charge?

What concept states that atoms of different elements can combine in fixed ratios to form compounds?

Which model of the atom proposed by Niels Bohr describes electrons traveling in specific orbits around the nucleus?

Which particle in the atom has no electric charge?

What is the smallest unit of an element that retains the properties of that element?

What is the charge of a proton?

Which atomic model introduced the idea that electrons are in fixed energy levels?