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What characteristic was used to organize the first periodic table?
Mendeleev arranged the periodic table according to increasing atomic mass. This method has been used since he first developed it in the 1800s.
How was periodic table organized?
He organized the elements by the increasing order of the atomic mass.
When the elements were arranged in order of increasing atomic mass?
in 1869 by Dmitri Mendeleev
What does the atomic number and atomic mass have to do with the arrangement of the elements on the periodic table?
The elements on the periodic table are arranged in order of increasing atomic number.
How tellurium and iodine show the periodic table is not arranged on basic of increasing atomic mass?
They show that the periodic table isn't arranged on the basis of increasing atomic mass because iodine has a mass lesser than tellurium. Iodine has a mass of 126.90 and tellurium has a mass of 127.60.
In what order did Mendeleev arrange the elements in the first periodic table?
Mendeleev arranged the elements in the periodic table according to their atomic masses.
Which scientist arranged the elements in order of increasing atomic number rather than increasing atomic mass?
Henry Moseley arranged the elements in order of increasing atomic number rather than increasing atomic mass, which led to the modern periodic table.
What characteristic was used to organize the first periodic table?
Mendeleev arranged the periodic table according to increasing atomic mass. This method has been used since he first developed it in the 1800s.
Towards the bottom of the periodic table does the atomic mass increase or decrease?
Towards the bottom, atomic mass increases. Atomic number also increases.
What change in atomic number occurs when a nucleus emits an alpha particles?
An alpha particle has 2 protons and 2 neutrons. This would make the atomic number decrease by 2 and the Atomic Mass will decrease by 4.
How is the density affected by increasing volume while holding the mass constant?
(mass) Density is mass/volume, so increasing the volume with mass held constant will decrease the density.
How did mendellev design the periodic table?
Mendeleev designed the periodic table by increasing atomic mass. But it was later changed to increasing atomic number.
Mendeleev arranged the elements in his periodic table in order of?
Mendeleev arranged the elements in his periodic table in order of increasing atomic mass while also grouping elements with similar properties together. His periodic table laid the foundation for the modern periodic table we use today.
What is the general trend in densities for period 2?
The general trend in densities for period 2 elements of the periodic table is that densities increase from left to right. This is because elements in period 2 have increasing atomic numbers, leading to an increase in atomic mass and a decrease in atomic volume, resulting in higher densities.
What do neutrons add to an atom?
Neutrons add mass and stability to an atom by increasing the atomic weight without changing the chemical properties. They also help to hold the nucleus together by balancing the repulsive forces between protons.
Who is Dmitri Mendeleev?
He proposed one of the early versions of the Periodic Table. He arranged the elements in the increasing order of their increasing Atomic Mass and repeating properties.
The elements in Period 5 on the Periodic Table are arranged from left to right in order of?
Elements are arranged in order of their Proton Number/Electron Number. they are NOT arranged in Atomic Mass , because a given element my have isotopes, which alters the Atomic Mass.
