Question

5. Which substance released the alpha
particles ?​

Answer 1

Answer:

Alpha particles, positively charged particle, identical to the nucleus of the helium >4 atom , spontaneously emitted by some radioactive substances, consisting of two protons and two neutrons bound together, thus having the mass of four units and a positive charge of two.

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Answer 2

Answer:

uranium, thorium, actinium, radium.

Explanation:

Alpha particles are commonly emitted by all of larger radioactive nuclei..