So Thomson, reasonably, thought that there must be something inside the atom with a positive charge that was canceling out the negative charges of the electrons. What he envisaged was called the "Plum Pudding Model" with the electrons embedded like plums in the pudding of positive charge. ...
a因为他锻炼我们的意志 Because he exercises our will [translate] aan atom or group of atoms that carries a positive or negative charge as a result of having lost or gain one or more electrons 运载一个正面或负电荷由于丢失的原子或小组原子或获取一个或更多电子 [translate] ...
CHARGE TRANSFER BETWEEN POSITIVE ALKALI IONS AND ATOMSW.R. GentryYuan-tseh LeeBruce H. Mahan
positive charges in the nucleus. The atomic weight of an element is determined by combining the total number of protons and neutrons in the nucleus. An electron carries a single negative charge. If an atom of an element is to have zero charge, it must have the same number of electrons ...
atom's mass, while the electrons occupy the electron shells or energy levels surrounding the nucleus. The number of protons determines the atom's atomic number, defining its element. Atoms are electrically neutral, with the positive charge of the protons balancing the negative charge of the ...
Not long after Rutherford’s gold foil experiment, the English scientist Henry Moseley (1887–1915) discovered that atoms of each element contain a unique positive charge in their nuclei. 卢瑟福α粒子轰击金箔实验后不久,英国物理学家莫色赖发现每种元素的原子的原子核所带正电荷数是不同的。
Theatomicnumberof an element is the number of free protons (those not in neutrons) in the nucleus; it is equal to the net positive charge of the nucleus. Theatomicweightis the weight of an atom of a substance as compared with the weight of an atom of carbon-12, which is taken as 12...
Mostpositiveparticlesaimedatatomsofgoldwentstraightthroughtheatoms.Onlyafewweredeflected.Rutherfordconcludedthatatomshaveasmall,densenucleuswithapositivecharge.5 Copyright©2004PearsonEducationInc.,publishingasBenjaminCummings.StructureoftheAtom Anatomconsistsofanucleusandacloudofelectrons.Thenucleuscontainsalloftheprotons...
An atom or a group of atoms with at least one unpaired electron . 原子因,基团,至少有一个游离电子的原子或一组原子。 www.ecd123.com 4. An atom or group of atoms carry a positive or negative charge as a result of having gained or lost one or more electrons. 得到或失去一个或一个以上...
a thorough analysis of all samples was performed. Titers of 1100 or more were indicative of a positive SAT test; a positive ELISA result was determined by an index exceeding 11; a Brucellacapt titer of 1/160 marked a positive outcome. A comparative analysis of the three methods involved calc...