It's J.J. Thomson
He had the plum pudding experiment
The answer is Thomson
That was Earnest Rutherford. He carried out gold leaf experiment
ratharford 1911
JJ Thomson, discoverer of the electron.
thomsom
It is because an atom consists of electrons(negatively charged) and protons(positively charged) and neutrons(no charge), and the no. of electrons and protons are equal. So due to opposite charges between an electron and a proton, an atom has no electric charge or is said to be neutral.
Someone Rutherford.
i think Dalton said it
Rutherford proved it it from his alpha-particle scattering experiment.
Democritus did. The modern version of the atomic theory is based on the research of Dalton.
In an atom, protons are positively charged and electrons are negatively charged. If the number of protons and electrons are equal, those atoms are said to be neutral. If they are not equal, it has formed an ion with the net charge.
a electically charged atom is also known as a eletron
J.J. Thomson while performing an experiment noticed the canal rays and said that they were electrically negative in nature and that was due to negatively charged particles. He called these negatively charged particles electrons. Since, at that time many speculations were being done regarding the structure of an atom, he provided his model of an atom which is commonly called the "Plum-pudding model or Watermelon model". Since, the atoms were electrically neutral, therefore he said that the electrons were uniformly distributed in a positively charged shell just like there are seeds in a watermelon. But his speculations and model were rejected after Rutherford's 'Gold foil Experiment'.
not positive but jj thomson
It is because an atom consists of electrons(negatively charged) and protons(positively charged) and neutrons(no charge), and the no. of electrons and protons are equal. So due to opposite charges between an electron and a proton, an atom has no electric charge or is said to be neutral.
It depends on the atom. An atom is made of 3 subatomic particles- a negatively charged electron, a positively charged proton, and a neutral neutron. If the number of electrons and the number of protons are different, then the atom has a net charge. If the number of electrons and the number of protons are the same, then the atom is said to be neutrally charged. Changing the number of neutrons affects the mass and therefore important traits of each atom, but does not affect its charge. Atoms that have a net charge are called 'ions.'
cell membrane, nucleus,mitochondria
J.J.Thompson
Positively charged central part of the atom the nucleus is called protons.
This question is fairly ambiguous, and answering it requires that we clear up some of the ambiguities. The "little negatively charged subatomic particles" ... let's just stipulate that the question said "electrons" instead. There are lots of negatively charged subatomic particles other than electrons, but electrons make the most sense in this context. Next, let's agree that "layer" actually means "principal quantum number," or what in Freshman Chemistry is usually called a "shell". The answer then is that it depends what layer/shell/principal quantum number we're talking about. For the first one, 2. For the second, 8. For the third, 18. For the fourth, 32. And in general, for the Nth one, 2N2.
If an object has more electrons than proton it is said to be negatively charged and is called an anion.
Generally, the theoretical first is given to Richard Laming of England in 1851. More theoretical work and the term "electron" came from G. Johnstone Stoney between 1874 and 1891. The actual "discovery" is given to J. J. Thomson in 1897.