Atomic Nucleus

Mr. Anderson's video on atomic nuclei covers the discovery by Ernest Rutherford, explaining the structure of atoms with protons and neutrons. It discusses isotopes, their stability, and radioactive decay, including alpha, beta, and gamma radiation. The video also explains the periodic table's relation to protons and isotopes, using uranium as an example to illustrate decay and half-life concepts.

Who discovered the atomic nucleus?

• JJ Thompson

• Niels Bohr

• Albert Einstein

• Ernest Rutherford

What determines the element of an atom?

• Number of protons

• Number of electrons

• Number of isotopes

• Number of neutrons

What is an isotope?

• Atoms with the same number of electrons but different numbers of protons

• Atoms with the same number of protons and neutrons

• Atoms with the same number of protons but different numbers of neutrons

• Atoms with the same number of neutrons but different numbers of protons

What is the atomic number of uranium?

• 92

• 238

• 143

• 146

What type of radiation involves the emission of two protons and two neutrons?

• Beta radiation

• Gamma radiation

• Neutron radiation

• Alpha radiation

What is the half-life of uranium-238?

• 3.5 billion years

• 2.5 billion years

• 1 billion years

• 4.5 billion years

What happens to an element when it undergoes alpha decay?

• It gains two neutrons

• It loses two protons and two neutrons

• It loses two electrons

• It gains two protons