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sdp
are electrons, negetively charged particles equal in nuz-
ber to the protona in the nucleus. The numbar of protons
is constant for the atoms or any given element, detorninos
the chemical charaeteristios of the element, and any change
in this number produces e new element. The esission of
charged particles from a rediosetive element takes place
from the nucleus of the atom, and the atom from which the
particle is emitted becomes an atom of a new element, dif-
fering in charaeteristies and properties from the parent
element. For exanple, an alpha particle is itself the
nucleus of the helium atom carrying a double charge, and
consists of two protons and two neutrons. Its emission
from the nucleus of an aton produces a new aton having
two less protons and teo lesa neutrons in the nueleus, and,
therefore, also two less electrons in the orbits. Again,
the emission of a beta particle (which is a negatively
charged particle or electron) from the nucleus results in
an increase in positivo charges in the nucleus and an atos
of E new element is produced.
Radium is in the so-called
disintegration series, which eabraces 15 members and e
separate and distinet elements. Uranium is the original
parent, radium is the sixth member, and lead the last.
The entire series is as follows:
- -3-
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"ocrText": "sdp\nare electrons, negetively charged particles equal in nuz-\nber to the protona in the nucleus. The numbar of protons\nis constant for the atoms or any given element, detorninos\nthe chemical charaeteristios of the element, and any change\nin this number produces e new element. The esission of\ncharged particles from a rediosetive element takes place\nfrom the nucleus of the atom, and the atom from which the\nparticle is emitted becomes an atom of a new element, dif-\nfering in charaeteristies and properties from the parent\nelement. For exanple, an alpha particle is itself the\nnucleus of the helium atom carrying a double charge, and\nconsists of two protons and two neutrons. Its emission\nfrom the nucleus of an aton produces a new aton having\ntwo less protons and teo lesa neutrons in the nueleus, and,\ntherefore, also two less electrons in the orbits. Again,\nthe emission of a beta particle (which is a negatively\ncharged particle or electron) from the nucleus results in\nan increase in positivo charges in the nucleus and an atos\nof E new element is produced.\nRadium is in the so-called\ndisintegration series, which eabraces 15 members and e\nseparate and distinet elements. Uranium is the original\nparent, radium is the sixth member, and lead the last.\nThe entire series is as follows:\n- -3-"
}