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First of all there is NO reason for the plural form of this question, because every element has only ONE unique atomic number with ONE unique symbol. In this case 86Ra

Radium is a radioactive chemical element which has the

symbol Ra and

atomic number 88 (group II, period 7 in the PS).

Its appearance is almost pure white, but it readily oxidizes on exposure to air, turning black. Radium is an alkaline earth metal (like Ca and Ba).

Ra is found in trace amounts in uranium ores. It is extremely radioactive. Its most stable isotope, 226Ra, has a half-life of 1602 years and decays into radon (86Rn) gas.

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What is the symbol for an atom of radium 88 protons and 140 neutrons?

Ra-228


What has 88 protons and 138 neutrons?

The number of protons of an atom is given by its atomic number. Checking the periodic table, we see that the atom with 88 protons is radium. The isotope of radium with 138 neutrons would thus be 226Ra.


How many particles are in the nucleus of an atom of Radium?

An atom of radium has a nucleus containing 226 particles, which includes 88 protons and 138 neutrons. The number of protons determines the element's identity, while the total number of protons and neutrons gives the mass number of the isotope. Therefore, the nucleus of a radium atom specifically has 226 nucleons.


What is the radium-235 atom?

It is an isotope of the element, radium (Ra), with 88 protons, 88 electrons and 147 neutrons (235 - 88 = 147).


How many protons in radium?

There are 88 protons in a radium atom.


What subatomic particals are in nucleus?

The three subatomic particles found in the nucleus of an atom are protons, neutrons, and electrons. Protons have a positive charge, neutrons have no charge, and electrons have a negative charge. Together, they make up the structure of an atom.


An atom contains 55 protons and 78 neutrons. Which nuclide symbol is the correct symbol for the atom?

The atom with 55 protons and 78 neutrons is silver-133. Therefore, the correct nuclide symbol would be (_{47}^{133}Ag).


What is the symbol for an atom composed of 17 protons 18 neutrons and is neutral?

The symbol for an atom with 17 protons and 18 neutrons is ( \text{Cl} ) (chlorine). The atomic number, which represents the number of protons, is 17, making it chlorine. The mass number, calculated by adding the number of protons and neutrons, is 35 (17 protons + 18 neutrons). Therefore, the complete symbol with the mass number is ( \text{Cl}^{35} ).


What is the symbol for an atom that has 20 protons and 22 neutrons?

The atom with 20 protons and 22 neutrons would be Calcium (Ca) with atomic number 20 and mass number 42 (20 protons + 22 neutrons).


The mass number of an atom is equal to what?

The mass number of an atom is equal to the sum of its protons and neutrons. It is represented by the letter "A" in the chemical symbol notation, where A = number of protons + number of neutrons in the nucleus of the atom.


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Is the symbol for an atom with 107 protons and 155 Neutrons 107 155 BH?

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