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There is NO element with the Atomic No. of 238. Atomic No. only go to ~ 110.
However, There is an element with Atomic Mass of 238, it is an isotope of Uranium
NB .
Atomic Number refers to
#1 the position in the Periodic Table
#2 the number of protons in the element
#3 the number of electrons in the neutrally charged element.
Atmoic Mass refers to the Sum total of all the protons and neutrons in the nucleus of an element.
An element such as Uranium would be shown in the periodic table as [238/92]U. The two numbers indicating the Atomic Mass and the Atomic Number.
lenpollock
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∙ 13y agoAtomic size. Atomic weight is the mass of an atom or molecule expressed in atomic mass units (AMU).
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∙ 14y agoThe atomic weight that equals 238 is:
Uranium 92
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∙ 11y agoThe element could be either Neptunium or Uranium.
Wiki User
∙ 11y agoNo element has the atomic number 238. At present, the periodic table only goes up to atomic number 118.
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∙ 11y agoNone of them. The highest atomic number is 118.
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∙ 11y agoUranium has an atomic weight of 238.02891
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∙ 11y agoUranium (atomic number 92)
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∙ 14y agouranium
Wiki User
∙ 13y agoUranium
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How do you calculate how many neutrons there are in an atom?
The number of neutrons in an atom is easily calculated by taking the mass number and subtracting the atomic number. Take for example, Uranium: the mass number on the periodic table is 238, while the atomic number is 92. Take the difference of 238 and 92 and that will be equal to the number of neutrons. 238-92=146
What is the Highest atomic number on the Periodic Table?
The element provisionally named ununoctium, believed discovered in 2003, has atomic number 118 in Period 7, column 18, with an atomic weight of 294. Once confirmed, it will be given its permanent element name.
The atomic number determines the what?
The number of protons.
What do the individual squares in the periodic table?
Each individual square in the periodic table represents one element. It gives the chemical symbol for the element. The number for the element, which is the number of protons. It gives the average atomic weight. The atomic weight is roughly the weigh of the protons and the neutrons. For example: Uranium, element number 92, has the symbol U. It has 92 protons. It comes in 3 isotopes or different forms but with the same chemical properties. It comes as U 238, U 234, and U 235. That means Uranium 238 has 92 protons and 148 neutrons. Depending on the periodic table, it may also have other information.
What does the atomic number equal of an element?
The atomic number of an element equals the number of protons in the element.
What is the mass number of urnanium?
Uranium is a non metal element. Atomic mass of it is 238.
The word for the element with the atomic weight of 238?
Uranium
What is the definition for number of protons in the nucleus of an atom?
The number of protons in neutrons in the nucleus of an atom is defined as atomic mass. The average atomic mass for all the isotopes of an element is given as the element's atomic weight. This is why atomic weights are decimal numbers.
How do you calculate how many neutrons there are in an atom?
The number of neutrons in an atom is easily calculated by taking the mass number and subtracting the atomic number. Take for example, Uranium: the mass number on the periodic table is 238, while the atomic number is 92. Take the difference of 238 and 92 and that will be equal to the number of neutrons. 238-92=146
Average mass of one atom of an element?
what is the atomic mass of an element : atomic mass is equal to the number of protons and number of neutrons present in an element
What is the Highest atomic number on the Periodic Table?
The element provisionally named ununoctium, believed discovered in 2003, has atomic number 118 in Period 7, column 18, with an atomic weight of 294. Once confirmed, it will be given its permanent element name.
What is the mass number of uranium-235?
The atomic mass of uranium 238 is 238,050 788 247
The atomic number determines the what?
The number of protons.
What is the term for the value that indicates the number of protons for an atom of a given element?
The atomic number is the number of protons in an atom of an element.
What does the atomic number of an element tell you about the element?
Atomic number = Number of protons
What does an element's atomic number stand for?
Atomic number is the number of protons in the atomic nuclei of the atoms of an element.
How many neutrons are there in an atom of uranium whose mass number is 235?
Like all isotopes of uranium (identified by the "mass number" following the element name--235, in this case), U 235 has the atomic number 92. An element name is really just a more memorable way to designate a specific atomic number. This is because different isotopes with the same atomic number such as U 238 (the common type) and U 235 (a rare type)--or, to take a more common example, Carbon 12 (the common kind) and the slightly radioactive Carbon 14 (extremely rare), share the same number of electrons with all weights of the element. To put it another way, an isotope identified by a mass number (235 or 238) is just a slightly leaner or heavier version of the same atomic number. So, even though U 238 has three more neutrons in its nucleus than does U 235, the two have the same atomic number; which is just another way of saying they are the same element. The number of electrons determines how an element behaves chemically and that's how element names are assigned. Elements are sorted by chemical interaction characteristics, not by weight: weight. The mass number (in this question, 235) is a subdivision of element/atomic number. If an element has the same name, but a different mass number, all elements with that name share the same atomic number.
