An element with an atomic number 90 (# of protons in nucleus) ejects an alpha particle and a beta particle. What is the final atomic number?

An element with an atomic number 90 (# of protons in nucleus) ejects an alpha particle...
An atomic nucleus at rest decays radioactively into an alpha particle and a smaller nucleus. What will be the speed of this recoiling nucleus if the speed of the alpha particle is 2.6 x105 m/s. Assume the recoiling nucleus has a mass 57 times greater than that of the alpha particle.
When 21884Po emits a beta particle, it transforms into a new element. What are the atomic number and atomic mass of this new element? What is the atomic mass? What are they if the polonium instead emits an alpha particle? atomic number? atomic mass?
Problem 10.23 An alpha particle (a helium nucleus, containing 2 protons and 2 neutrons) starts out with kinetic energy of 9.9 MeV (9.9 x 100 eV), and heads in the +x direction straight toward a gold nucleus (containing 79 protons and 118 neutrons). The particles are initially far apart, and the gold nucleus is initially at rest. Answer the following questions about the collision. What is the initial momentum of the alpha particle? (You may assume its speed is small...
Give the atomic number, mass number, and product element name when: A. The isotope of atomic number 84 and mass number 212 emits an alpha particle. and, B. The isotope of atomic number 48 and mass number 113 emits a beta particle.
When 22688Ra decays by emitting an alpha particle, what is the atomic number of the resulting nucleus? What is the resulting atomic mass?
An atomic nucleus initially moving at 360 m/s emits an alpha particle in the direction of its velocity, and the remaining nucleus slows to 260 m/s If the alpha particle has a mass of 4.0 u and the original nucleus has a mass of 222 u, what speed does the alpha particle have when it is emitted?
Q3. An atomic nucleus initially moving at 320 ms emits an alpha particle in the direction of its ve and the remaining nucleus slows to 280 msiinal n locity. mass of 222 u, e alpha particle has a mass of 4.0 u and the original nucleus has a What speed does the alpha particle have when it is emitted?
An atomic nucleus initially moving at 432m/s emits an alpha particle in the direction of its velocity, and the new nucleus slows to 346m/s. If the alpha particle has a mass of 2u and the original nucleus has a mass of 222u, what speed does the alpha particle have when it is emitted? I need the correct answer to give full rating.
An alpha particle consists of two protons and two neutrons together in one nucleus with a mass of 6.64×10−27 kg and charge +2e. The alpha particle flies at 3.0×106 m/s from a large distance toward the nucleus of a stationary gold atom (charge +79e). e=1.6×10−19C,k=9.0×109Nm2/C2. Determine the distance of the alpha particle from the gold nucleus when it stops.
An atomic nucleus initially moving at 390 m/s emits an alpha particle in the direction of its velocity, and the remaining nucleus slows to 280 m/s . If the alpha particle has a mass of 4.0 u and the original nucleus has a mass of 222 u, what speed does the alpha particle have when it is emitted? Express your answer to two significant figures and include the appropriate units.