all large radioactive atoms decay into smaller atoms by releasing alpha particles. each alpha particle has 2…

all large radioactive atoms decay into smaller atoms by releasing alpha particles. each alpha particle has 2 protons, 2 neutrons, and 0 electrons. the table below describes several neutral, low - mass atoms.\n\n| stable isotopes of low - mass elements | | | |\n|--|--|--|--|\n| element name | symbol | atomic number | number of neutrons |\n| hydrogen | h | 1 | 0 |\n| helium | he | 2 | 2 |\n| lithium | li | 3 | 4 |\n| beryllium | be | 4 | 5 |\n\nan alpha particle is also referred to as a nucleus of which isotope?\n○ lithium - 7\n○ helium - 4\n○ hydrogen - 2\n○ helium - 2

all large radioactive atoms decay into smaller atoms by releasing alpha particles. each alpha particle has 2 protons, 2 neutrons, and 0 electrons. the table below describes several neutral, low - mass atoms.\n\n| stable isotopes of low - mass elements | | | |\n|--|--|--|--|\n| element name | symbol | atomic number | number of neutrons |\n| hydrogen | h | 1 | 0 |\n| helium | he | 2 | 2 |\n| lithium | li | 3 | 4 |\n| beryllium | be | 4 | 5 |\n\nan alpha particle is also referred to as a nucleus of which isotope?\n○ lithium - 7\n○ helium - 4\n○ hydrogen - 2\n○ helium - 2

Answer

Brief Explanations:

An alpha - particle consists of 2 protons and 2 neutrons. The atomic number of an element is the number of protons and the mass number is the sum of protons and neutrons. For an alpha - particle, atomic number = 2 and mass number=2 + 2=4. Helium - 4 has an atomic number of 2 and a mass number of 4.

Answer:

helium-4