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Why was basis of classification of element in the periodic table changed from atomic mass to atomic number?
Mendeleev's Periodic Table was based on the atomic masses of elements. However, this was not effective when isotopes were discovered. An isotope of an element is defined as the element having the same atomic number but varying mass numbers. So, mass numbers weren't constant and hence, a better characteristic was chosen -atomic number. Atomic number of any element was a characteristic of a particular element. Hence atomic numbers were taken as the basis of classification instead of atomic masses.
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What was the periodic table first arranged by. How has this changed?
In 1869 Russian teacher and scientist Dmitri Mendeleev, presented a periodic table of the elements based on atomic weights. The current periodic table is arranged by the atomic numbers of the elements.
Can you find the atomic number of an element on the periodic table?
Atomic number of an element can be found on the periodic table. It is located at the upper left-hand corner of the table.
What element on the periodic table weighs 19.32?
No element has an atomic weight of 19.32 on the periodic table.
What does the atomic munber mean on the periodic table?
The atomic number on the periodic table represents the number of protons in an atom's nucleus. It determines the element's identity and its position on the periodic table. Each element has a unique atomic number.
What element is the first on the periodic table?
Hydrogen is the first element on periodic table. Its atomic number is 1.
What is the atomic number of Periodic Table element Period?
The atomic number of the Periodic Table element Period is 92.
What is the atomic number of the element lanthanum on the periodic table?
The atomic number of the element lanthanum on the periodic table is 57.
What element on the periodic table has the largest atomic number?
The element with the largest atomic number on the periodic table is Oganesson, with the atomic number 118.
What was the periodic table first arranged by. How has this changed?
In 1869 Russian teacher and scientist Dmitri Mendeleev, presented a periodic table of the elements based on atomic weights. The current periodic table is arranged by the atomic numbers of the elements.
What is the atomic number on the periodic table?
The atomic number on the periodic table is the number of protons for the element.
What classification does barium belong to?
Barium is a chemical element and is classified as a metal in the periodic table with the atomic number 56 and symbol Ba.
Was the first element on the periodic table of elements carbon?
NO!!! Hydrogen (H) is the first element on the Periodic Table. Reason Atomic No. = 1 Atomic mass( of protium) = 1 Carbon lies 6th position. Atomic No. = 6 Atomic mass = 12
What is a element of the periodic table meaning?
An element of the periodic table is a type of atom distinguished by its unique number of protons in the nucleus, also known as the atomic number. Elements are arranged in the periodic table based on their atomic number, allowing for easy identification and classification according to similarities in chemical properties. Each element has its own symbol, such as "H" for hydrogen or "O" for oxygen.
What is the atomic number of the element with the symbol "Pt" on the periodic table?
The atomic number of the element with the symbol "Pt" on the periodic table is 78.
What is the atomic number of an element listed in the Periodic Table refers to?
The atomic umber of an element listed in the periodic table refers to number of protons in the element. Atomic number is equal to number of protons.
Can you find the atomic number of an element on the periodic table?
Atomic number of an element can be found on the periodic table. It is located at the upper left-hand corner of the table.
What element on the periodic table weighs 19.32?
No element has an atomic weight of 19.32 on the periodic table.
