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.
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 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
Argon is a gas element. atomic number of it is 18.
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The atomic number of an element equals the number of protons in the element.
Uranium
Uranium is a non metal element. Atomic mass of it is 238.
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 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
Atomic number = Number of protons
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.
The atomic number is the number of protons in an atom of an element.
The atomic number of the element with the symbol Be (Beryllium) is 4.
Argon is a gas element. atomic number of it is 18.
Atomic number is the number of protons in the atomic nuclei of the atoms of an element.
The element with the highest atomic number is Oganesson, with the atomic number 118.
An element's atomic number is the # of protons in its nucleus.