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Calculate the number of protons of the atom whose mass number is 19 and whose number of neutrons is 10?
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∙ 10y ago
Mass number 19 means a total of 19 protons and neutrons. If it has 10 neutrons, that leaves 9 protons, which is Fluorine.
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∙ 10y ago
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∙ 13y ago9
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What is the symbol of an isotope of cesium whose atoms have 82 neutrons?
You are looking for the symbol of cesium (Cs) and indication of its mass number. The mass number is the sum of the protons and neutrons. So if every atom of cesium has 55 protons, then the mass number of this isotope is 137. The mass number is indicated in superscript before the symbol: 137Cs
What element has an atomic number of 74?
The atomic number is the same as the number of protons. So, from an atomic number of 74, we can conclude that there are 74 protons. One proton cancels out the charge of one electron, therefore, equal numbers of protons and electrons results in a neutral particle. For an atom with 74 protons to be neutral, 74 electrons are needed to balance.
How are the eleven electrons of the sodium atom arranged?
The atomic number of any element is always the same. its always equal to the number of protons. the neutrons have no effect on the atomic number, just the atomic MASS So the atomic number of Sodium(Na) is 11, and will always be 11
Which element has the mass number of 65 with 34 neutron and the charge is 3 plus?
Strictly speaking what you have described is an ion of an isotope of an element. With a mass number of 65 and 34 neutrons, the number of protons would be 65-34 = 31, which corresponds to Gallium. With a mass number of 65 and a charge of 3+ you would have the ion of the isotope: 65Ga3+ Gallium has 24 isotopes whose half-lives are known, with mass numbers 61 to 84. Of these, two are stable: 69Ga and 71Ga. 65Ga has a half life of 15.2 min
What element has only 12 protons?
Each atom of the element magnesium contains exactly 12 protons.
Calculate the number of neutrons of the atom whose atomic number is 42 and whose mass number is 96?
No. of neutrons= Mass no.- No.of protons(atomic no) therefore, no. of neutrons =96-42 = 54
Is this statement correct atoms are made up of nucleus and electrons composed of protons whose number is called the atomic number and neutrons whose numbers added together make the mass number?
It's close, but an atom is made of a nucleus and electrons. The nucleus is made of protons and neutrons. The number of protons equals the atomic number of the element, and the atomic mass is the number of protons plus neutrons.
What is an isotone?
Isotopes are atoms of the same element with different numbers of neutrons, but the same number of protons.
Do atoms have neutrons in them?
Atoms of all elements can have neutrons in them. Only the element hydrogen has an isotope whose atoms do not contain neutrons, but all other isotopes of hydrogen have neutrons in them. In the heavier elements the number of neutrons always exceeds the number of protons in the atom.
How many protons neutrons and electrons in 58cr and 63cr?
Assuming that the questioner intended to write "Cr" instead of "cr", the isotopes indicated are those of the element chromium, whose atomic symbol is "Cr" and whose atomic number is 24. The atomic number is defined as the number of protons in a nucleus of each atom, and the atomic mass number, which precedes the atomic symbol, is defined as the number of protons and neutrons combined. In order to maintain electrical neutrality as is required for any atom, the number of electrons must be the same as the number of protons. From the definition of mass number, it follows that the number of neutrons is equal to the atomic mass number minus the atomic number. Therefore, each isotope named in the question has 24 protons and 24 electrons, but the isotope with mass number 58 has 32 neutrons and the isotope with mass number 63 has 32 neutrons has 39 neutrons.
How do you work out how many electrons protons and neutrons an atom has?
if it is a discovered element, look up its atomic number. that is a count of the number of protons in an atom of that element. the number of protons can also be determined by the magnetic charge with no electrons.
The atomic mass of an element whose atoms consist of eight protons nine neutrons and eight electrons is what?
To calculate atomic mass, only the amount of protons and neutrons will be summed. So eight protons plus nine electrons equals seventeen atomic mass units.
What is the symbol of an isotope of cesium whose atoms have 82 neutrons?
You are looking for the symbol of cesium (Cs) and indication of its mass number. The mass number is the sum of the protons and neutrons. So if every atom of cesium has 55 protons, then the mass number of this isotope is 137. The mass number is indicated in superscript before the symbol: 137Cs
The atomic weight of an element whose atoms contain 8 protons 8 electrons and 8 neutrons is?
That would be an oxygen isotope and it's Atomic Mass would be 16. (Protons + Neutrons) The mass of an electron is so minuscule that it is not even factored into the mass.
What is the atomic number of an element whose atoms have 9 protons and 10 neutrons?
The atomic number is the number of protons. It is also the number of electrons. The atomic mass equals the protons and neutrons together/weight of the nucleus. So, the atomic number would be nine, because there are 9 protons. The atomic mass would be around 19, because there would be 9 protons and 10 neutrons in the nucleus. The element you are talking about is actually Fluorine, and on the periodic table it says that the atomic mass is 18.9984032. This is because the atomic mass is usually never an exact amount. You can round this decimal place to 19, anyway.
Which particles determine the mass of an atom?
The atomic mass unit is defined to be 1/12 of the mass of a carbon-12 atom. Atomic masses can determined by weighing molar amount of an isotope. Absolute masses (in kg) are determined by measuring the amount that charged atoms are deflected by magnets, since if you know the charge you can calculate mass from the amount of deflection.
How many protons does an atom have with a mass number of 43 and 21 electrons?
The atomic no. in this case 22, is equal to the no of protons and also electrons. So it has 22 protons and 22 electrons. The mass no. is equal to the no. of protons plus the no. of neutrons. So it has 22 protons and 26 neutrons. The metal with atomic no. 22 on the periodic table is titanium.
