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What was the contribution of H. Moseley in the development of atomic theory?
He determined the number of positive charges in the nucleus of an atom. He was the first one to bring the concept of atomic number.
What contribution did Mosley makers the development of the periodic table?
Henry Moseley showed elements in the periodic table should be in order by their atomic number instead of atomic mass.
How do you figure out how many neutrons are in a a atom?
Each nucleon (proton or neutron) contributes about 1 atomic mass unit to the mass of the atom. The mass contribution of the electrons can be ignored, since it takes about 1800 of them to equal the mass of a nucleon and the heaviest elements known have around 1/15th that number of electrons. So if you subtract the atomic number (number of protons) from the atomic mass rounded to the nearest whole number (number of nucleons), what's left is the number of neutrons.
What is the effective atomic number of water?
The effective atomic number of water is approximately 7.42. This value takes into account the contribution of the hydrogen atoms in water in addition to the oxygen atom. It is a way to characterize the overall electron density of the molecule.
Aryabhatta's contribution to the number system ANSWER?
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This element has an atomic number that is double the atomic number of silicon?
this elemnt has an atomic number that is double the atomic number of silicon?
What was Dmitri Mendeleev able to do show the value of his contribution?
Dmitri Mendeleev was able to demonstrate the value of his contribution to chemistry by accurately predicting the properties of undiscovered elements and leaving gaps in his periodic table for them, which were later filled by their discovery. This validated the organization of elements by atomic number and helped establish the periodic law.
What is the number of protons in the neucleus called?
the answer is that it is called a atomic number.
This element has the atomic number that is double the atomic number of silicon?
The element with an atomic number that is double the atomic number of silicon is germanium, with an atomic number of 32. Silicon has an atomic number of 14.
Element has an atomic number that is double the atomic number of silicon?
The element with an atomic number that is double the atomic number of silicon is germanium, with atomic number 32. Silicon has an atomic number of 14.
Atomic number in the atomic nucleus?
The atomic number is equal to the number of the protons in the atomic nucleus.
What element is not bonded in nature?
Synthetic ElementsQuasi-synthetic elements:Technetium, atomic number 43Promethium, atomic number 61Astatine, atomic number 85Francium, atomic number 87Neptunium, atomic number 93Plutonium, atomic number 94Transuranium elementsAmericium symbol Am, atomic number 95Curium symbol Cm, atomic number 96Berkelium symbol Bk, atomic number 97Californium symbol Cf, atomic number 98Einsteinium symbol Es, atomic number 99Fermium symbol Fm, atomic number 100Mendelevium symbol Md, atomic number 101Nobelium symbol No, atomic number 102Lawrencium symbol Lr, atomic number 103Transactinide elements Rutherfordium symbol Rf, atomic number 104Dubnium symbol Db, atomic number 105Seaborgium symbol Sg, atomic number 106Bohrium symbol Bh, atomic number 107Hassium symbol Hs, atomic number 108Meitnerium symbol Mt, atomic number 109Darmstadtium symbol Ds, atomic number 110Roentgenium symbol Rg, atomic number 111Copernicium symbol Cn atomic number 112Provisional names of Recently observed synthetic elements:Ununtrium symbol Uut, atomic number 113Ununquadium symbol Uuq, atomic number 114Ununpentium symbol Uup, atomic number 115Ununhexium symbol Uuh, atomic number 116Ununseptium symbol Uus, atomic number 117.Ununoctium symbol Uuo, atomic number 118
