Question

which atomic model states that it is impossible to know the exact location of electrons around the nucleus?
bohr model
dalton model
plum pudding model
electron - cloud model

Explanation:

• Bohr model: Proposes electrons orbit the nucleus in fixed paths.
• Dalton model: Views atoms as indivisible solid spheres.
• Plum pudding model: Suggests electrons are embedded in a positive "soup".
• Electron - cloud model: Based on quantum mechanics, which states it's impossible to know the exact location of electrons. We can only determine the probability of finding an electron in a certain region (electron cloud).

Answer:

electron - cloud model