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Doubly-charged helium ions are also known as which of the following?
X-rays
Gamma particles
Alpha particles
Beta particles
Alpha particles
Doubly-charged helium ions (He2+) are essentially helium nuclei stripped of their two orbital electrons. These particles are identical to alpha particles, which are emitted during the radioactive decay of heavy elements.
Doubly-charged helium ions (He2+) are essentially helium nuclei stripped of their two orbital electrons. These particles are identical to alpha particles, which are emitted during the radioactive decay of heavy elements.
Think of a helium atom as a person wearing two heavy coats (electrons). A doubly-charged helium ion is that same person after taking off both coats, leaving only the person (the nucleus) who now moves faster and has a different 'interaction' profile with the surroundings.
He+2 = Alpha particle (He-Alpha: Two steps removed)
24тАЛHe2+ тАФ Chemical notation for an alpha particle/doubly-charged helium ion
Q=+2e тАФ Charge of an alpha particle, where e is the elementary charge
A neutral helium atom consists of two protons, two neutrons, and two electrons. When both electrons are removed, only the nucleus containing two protons and two neutrons remains. This nucleus carries a positive charge of +2e and has a mass approximately four times that of a hydrogen nucleus, matching the properties of alpha particles used in atomic physics experiments.
An alpha particle contains 2 protons and 2 neutrons.
It has a mass of approximately 4 atomic mass units (amu).
It possesses a +2 elementary charge.
They are primarily produced by alpha decay of heavy radioactive nuclei like Uranium or Radium.
High ionizing power due to double positive charge
Used in landmark experiments like the Rutherford Gold Foil Experiment
Low penetration power; stopped easily by a sheet of paper or human skin
Radioisotope Thermoelectric Generators (RTGs) in spacecraft
Smoke detectors (containing Americium-241 as an alpha source)
X-rays are high-energy electromagnetic radiation, not particles.
Beta particles are high-energy electrons or positrons.
Gamma particles is a misnomer; gamma radiation refers to electromagnetic photons.
C is correct тАФ Doubly-charged helium ions are identical to alpha particles, which consist of two protons and two neutrons.
Remember that alpha particles are effectively helium nuclei; they are heavy, positively charged, and travel relatively slowly compared to beta and gamma radiation.
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