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How did the discovery of electrons show that there are also positively charge parts of an atom?
The discovery of electrons through cathode ray experiments by J.J. Thomson demonstrated the existence of negatively charged particles. It raised the question of what positively charged particles balanced the charge in an atom. Subsequent experiments, like the gold foil experiment by Rutherford, led to the discovery of the atomic nucleus containing positively charged protons, thereby revealing the existence of both negatively and positively charged components within an atom.
What was Ernest Rutherford's biggest contribution to chemistry?
In 1911, Rutherford proposed a new model for the atom. His experiments were the first to show that the atom must consist of a very tiny positively charged nucleus surrounded by negatively charged electrons. (For the record, Rutherford also discovered and named alpha, beta and gamma radiation.)
Explain with suitable diagrams how an electroscope responds when the knob touches a positively charged object?
When the knob of the electroscope touches a positively charged object, electrons from the object are transferred to the electroscope, causing it to become positively charged. This causes the gold leaves to repel each other due to the like charges, spreading apart and indicating the presence of a positive charge on the electroscope. A diagram would show the initial position of the gold leaves close together, then spreading apart when the electroscope becomes positively charged.
What subatomic particle did the gold foil experiment discover?
Rutherford's gold foil experiment did not discover the existence of any subatomic particles, but it did show the existence of a small, tightly packed, positively charged nucleus and thus led to the discovery of protons.
What evidence is there that the nucleus of an atom is very small and positively charged?
Rutherford's famous gold foil and proton experiment showed that very occasionally a proton fired at a nucleus came straight back at the 'gun'. He likened it to a naval shell being returned after hitting a piece of tissue paper. The fact that so few protons returned or were deflected by the tiny nucleus compared to the billions emitted by the proton 'alpha' source showed that nuclei of gold atoms were small and very widely spaced apart.
Why are the central atoms shown as positively charged?
central atoms that are positively charged, either contain more protons than neutrons, or are simply made up of protons, therefore are not complete atoms. any imbalance of protons to electrons will make it no longer an atom but an ion. this is the only way it could be seen as positively charged because atoms are neutral.
How do you know protons are found in the nucleus?
The atomic number tells you how many protons are in the atomic nucleus. The atomic mass is the amount of protons plus the amount of neutrons in the atomic nucleus. So if you take the atomic number and subtract it from the atomic mass, it will give you the number of neutrons in the atomic nucleus.
Why photon show both electric and magnatic field?
Protons are positively charged that's why they show electric field while magnetic field develops when electric field is in either direction so protons develops magnetic fields also.
Would you show me The complete list of cations and anions?
Cations are positively charged ions, such as sodium (Na+), potassium (K+), and calcium (Ca2+). Anions are negatively charged ions, such as chloride (Cl-), sulfate (SO42-), and nitrate (NO3-). This is not an exhaustive list, but covers some common examples.
How does Rutherford's theory of atoms helped in the development of the modern atomic theory?
Rutherford's theory proposed that atoms have a dense, positively charged nucleus. This led to the understanding that atoms are mostly empty space with electrons orbiting the nucleus. This laid the foundation for the modern atomic theory, which further developed with the discovery of subatomic particles and the concept of atomic number.
Correct formula for ion sodium ion?
The correct formula for a sodium ion is Na+. Sodium loses one electron to become positively charged, so it is written as Na+ to show that it has lost one electron.
How did the discovery of electrons show that there are also positively charged of the atom?
The discovery of the electron proved the positive charge of the atom when sending an electric spark across an air gap from one electrode to another, called the photoelectric effect.
