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What is the atomic number of an atom that contains 19 protons 19 electrons and 21 neutrons?
The atomic number by definition is the number of protons in the nucleus, therefore 19 in this instance. (The isotope effectively specified by the numbers given in the question is potassium-40, which is least commonly occurring natural isotope of potassium.)
If Phosphorous has an atomic mass of 30 and atomic number of 15 how many neutrons does it have?
Atomic mass is equal to the number of protons + neutrons present in the nuclide. The atomic number is defined as the number of protons in the nuclide. Therefore to find the number of neutrons use the formula: atomic mass = #protons + # neutrons solving for # of neutrons you get: # neutrons = atomic mass - # protons plug in the given values: #neutrons = 31 - 15 # neutrons = 16
How do you find how many protonsneutrons and electrons are in an atom?
Using the periodic table you are able to determine the number of protons, electrons, and neutrons for any of the elements identified to this date. Knowing an element's name or symbol, look up the element in the table. For example lets look up Boron! Boron's chemical symbol is B, and from the periodic table its atomic number is 5. The atomic number of an element reveals the number of protons and also the number of electrons the element has as a single isolated atom. Although, the element may not exist freely as an isolated single atom in nature. So, Boron has 5 protons and 5 electrons. The number of neutrons an element may have can vary, and this is what differentiates stable and unstable isotopes of many elements. Boron has a molar mass of 10.811, and is listed with two stable isotopes: 10B and 11B. Subtracting the atomic number from the isotope number gives the number of neutrons boron is found with. The 10B isotope has 5 neutrons, and the 11B isotope has 6 neutrons. Since the molar mass is 10.811, we can tell that the 11B isotope is more abundant than the 10B isotope. If the distribution was equal then the molar mass would be 10.5.
How do you find the number protons from the atomic number?
Dear Wiki Questioner, The atomic number of an element is defined to be the number of protons its nucleus! Since the most useful characteristics of an element are the result of the number of protons it has, the scientific community chose to order the elements primarily based off of how many protons they contain. So that means that when we are given an atomic number, we automatically are given the number of protons it contains!
What information would be requierd to determine the mass number of nitrogen?
You would need to know how many protons and neutrons are in the nucleus of a particular isotope of nitrogen. The number of protons, which is its atomic number, will always be the same, no matter which isotope is given, but the number of neutrons differs with different isotopes. For example, one isotope of nitrogen has 7 neutrons. To determine its mass number, find nitrogen on the periodic table, and you will see that its atomic number is 7. So this isotope of nitrogen has 7 protons. Now, add the 7 neutrons to the 7 protons, and you get a mass number of 14 for this isotope of nitrogen, which is called nitrogen-14. (Isotopes are named by their mass numbers.) Another isotope of nitrogen has 8 neutrons. Add the 8 neutrons to the 7 protons (atomic number), and you get a mass number of 15 for this isotope of nitrogen, called nitrogen-15.
How can the atomic atom be used to determine the number of neutrons?
The atomic weight of any given isotope of an element is the result of the protons and the neutrons. The number of protons is the same as the atomic number, so if you subtract the atomic number from the atomic weight, voila, there is the number of neutrons. Bear in mind that elements have more than one isotope, and each isotope has a different number of neutrons. So the atomic weight is the result of a mixture of isotopes that appear in nature.
How many neutrons are in roentgenium?
Roentgenium-272 has 161 neutrons. Number of neutrons = Atomic mass of an isotope - Atomic number of the element The atomic number of roentgenium is 111, but Rg has many isotopes each with a different atomic mass and number of electrons.
How can you determine which isotope of a given atom is the most common?
round the atomic weight to the nearest whole number.
Which number for an isotope is the neutron number?
The number of neutrons is never directly displayed.For a given isotope of an element, the "top number" (e.g. 14C or carbon-14) is the atomic mass number, the total of neutrons and protons. To find the number of neutrons, subtract the atomic number from the isotopes atomic mass number. Here, 14C will have 8 neutrons.
How many protons and electrons and neutrons does berkelium have?
Number of neutrons = Atomic mass of an isotope - atomic number of the element The atomic number of berkelium is 97.Number of neutrons = Atomic mass of an isotope - atomic number of the element The atomic number of berkelium is 97.
How is the mass number of an isotope different from the average atomic mass that is on the periodic table?
The mass number for a particular isotope of an element is a precise value. The average atomic mass for an element is the value you would measure for that element given all the isotopes it has and their abundance in the sample.
What is make an atom isotope?
It is the neutron that makes changes in atomic nuclei to change them from one isotope to another. For any given element, that element will have a fixed number of protons. It is, after all, the number of protons that determine the elemental identity. But the number of neutrons in a given element can vary, and we use the term isotope to talk about which particular atom we're investigating. That is, we apply the term isotope to speak to an atom of a given element with a certain number of neutrons in its nucleus.
How many particles are found in the nucleus of the uranium atom?
92 protons, 92 electrons and a variable number of neutrons (each isotope has a specific number of neutrons) - the number of neutrons for a given isotope is the difference between the atomic number and the number of protons.
Approximately how many protons and neutrons are in the element uranium?
All the isotopes of uranium contain 92 protons; the number of neutrons is variable for each isotope: Number of neutrons = Atomic weight of the given isotope - 92
How many particles does ununhexium have?
Ununhexium has 116 protons and electrons. Number of neutrons = Atomic mass of a given isotope of Uuh - 116
What is the atomic number of an atom that contains 19 protons 19 electrons and 21 neutrons?
The atomic number by definition is the number of protons in the nucleus, therefore 19 in this instance. (The isotope effectively specified by the numbers given in the question is potassium-40, which is least commonly occurring natural isotope of potassium.)
How are the number of protons and neutrons in an atom determined using the periodic table?
The proton number is the same as the atomic number of the element, which can be found from the periodic table. The number of neutrons can be found by subtracting the atomic number from the mass number given for the isotope in question.
