Question: What Discovery Permitted The Revision Of The Periodic Law?

Who proposed modern periodic law?

Dmitri MendeleevThe periodic law was developed independently by Dmitri Mendeleev and Lothar Meyer in 1869.

Mendeleev created the first periodic table and was shortly followed by Meyer.

They both arranged the elements by their mass and proposed that certain properties periodically reoccur..

What are the limitations of Mendeleev’s periodic law?

State Two Limitations Of Mendeleev Periodic TableElements with large differences in properties were included in the same group. … No proper position could be given to the element hydrogen. … The increasing order of atomic mass was not strictly followed throughout.More items…

What is Mendeleev’s periodic law write two achievements and two limitations of Mendeleev’s periodic table?

Mendeleev’s Periodic Law: “Properties of elements are the periodic function of their atomic masses.” Achievements: (i) It could classify all the elements discovered at that time. (ii) It helped in the discovery of new elements.

What two properties are the modern periodic table based on?

The modern table is based on Mendeleev’s table, except the modern table arranges the elements by increasing atomic number instead of atomic mass. Atomic number is the number of protons in an atom, and this number is unique for each element.

What is a modern periodic law?

Modern periodic law: The Modern periodic law states “The chemical and physical properties of elements are a periodic function of their atomic numbers”.

What is Newland law of octave?

Law of octaves, in chemistry, the generalization made by the English chemist J.A.R. … Newlands in 1865 that, if the chemical elements are arranged according to increasing atomic weight, those with similar physical and chemical properties occur after each interval of seven elements.

What is the name of modern periodic table?

The periodic table, also known as the periodic table of elements, arranges the chemical elements such as hydrogen, silicon, iron, and uranium according to their recurring properties.

What is modern periodic law explain with examples?

The modern periodic law states that the physical and chemical properties of the elements are the periodic functions of their atomic numbers. Scientists arranged elements in increasing order of their atomic numbers from left to right across each row.

What does the periodic law allow us to do?

Elements of the periodic table are arranged in order of increasing atomic number. The periodic law states “When elements are arranged in order of increasing atomic number, there is a periodic repetition of their chemical and physical properties.”

Who is the father of modern periodic table?

Dmitri MendeleevPeriodic table/Inventors

Why are isotopes unstable?

Many elements have one or more isotopes that are radioactive. These isotopes are called radioisotopes. Their nuclei are unstable, so they break down, or decay, and emit radiation. … A: The nucleus may be unstable because it has too many protons or an unstable ratio of protons to neutrons.

Who is the first father of chemistry?

Antoine LavoisierIf you are asked to identify the Father of Chemistry for a homework assignment, your best answer probably is Antoine Lavoisier. Lavoisier wrote the book Elements of Chemistry (1787).

Can modern periodic table solve all problems?

No, the modern periodic table cannot solve all the problem. Explanation: Modern periodic table is a better alternative than the other form of the periodic table.

What is the difference between Mendeleev periodic law and modern periodic law?

Mendeleev’s periodic table is, based on relation of properties of elements as dependent on the atomic weight of element. But Modern periodic table considers atomic number as the fundamental property that decides the properties of elements.

How did the discovery of isotopes affect the periodic table?

Function. The discovery of the isotope showed that no two chemicals can be the same. Substances that occupy the same position in the chemical periodic table of elements and have the same chemical properties have differences because of their isotopic components.

Why do isotopes have the same properties?

Different isotopes of an element generally have the same physical and chemical properties because they have the same numbers of protons and electrons.

Which element has maximum number of isotopes?

cesiumThe elements with the most isotopes are cesium and xenon with 36 known isotopes. Some isotopes are stable and some are unstable. When an isotope is unstable it will decay over time and eventually it will turn into another isotope or element. Unstable isotopes are considered radioactive.

What are the limitations of modern periodic table?

The limitations of modern periodic table are: (a) Position of hydrogen: It could not assign a correct position to hydrogen in the table.