by John Carl Villanueva on July 23, 2009. An alpha particle is a particle made up of two protons and two neutrons. Since this configuration is similar to that of a helium nucleus, itâs often referred to as a helium nucleus.The term is commonly used in nuclear physics, and is one of the three particles commonly emitted during a radioactive decay, i.e., alpha, beta, and gamma particles.ince this configuration is similar to that of a helium nucleus, itâs often referred to as a helium nucleus. The term is commonly used in nuclear physics, and is one of the three particles commonly emitted during a radioactive decay, i.e., alpha, beta, and gamma particles.
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Toll-free telephone numbers in the North American Numbering Plan. In the United States of America, Canada, and other countries participating in the North American Numbering Plan, a toll-free telephone number has one of the area codes 800, 833, 844, 855, 866, 877, and 888. Area code 822 is expected to be used in the future, followed by 880 through 887, then 889. However, 811 is reserved as a three-digit number for various other purposes. In addition, 899 is reserved as a member of the series x9x for future numbering plan expansion. Calls to these numbers are fr