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Readers ask: Who made the second periodic table?

Dmitri Mendeleev

Eka-aluminium (Ea) Gallium (Ga)
Atomic weight About 68 69.72
Density of solid 6.0 g/cm³ 5.9 g/cm³
Melting point Low 29.78°C
Valency 3 3


Who made the 2nd periodic table?

In 1869, Russian chemist Dmitri Mendeleev created the framework that became the modern periodic table, leaving gaps for elements that were yet to be discovered. While arranging the elements according to their atomic weight, if he found that they did not fit into the group he would rearrange them.

What is the second periodic table?

The second period contains the elements lithium, beryllium, boron, carbon, nitrogen, oxygen, fluorine, and neon. In a quantum mechanical description of atomic structure, this period corresponds to the filling of the second (n = 2) shell, more specifically its 2s and 2p subshells.

Who discovered oxygen?

The horizontal rows of the periodic table are called periods. Period 2, or the second period, refers to the second row from the top of the periodic table.

Who created the periodic table and how is it organized?

In 1869 Russian chemist Dimitri Mendeleev started the development of the periodic table, arranging chemical elements by atomic mass. He predicted the discovery of other elements, and left spaces open in his periodic table for them.

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What is Maldives periodic table?

What is the law of the Mendeleev periodic table? Mendeleev claimed the famous periodic law that “Element properties are a periodic function of their atomic weight.” Mendeleev placed elements in the order of their atomic weights in the form of a table known as the Periodic Table of Mendeleev.

Who is the father of periodic?

Internet search giant Google has dedicated a Doodle to Russian chemist Dmitri Mendeleev on his 182nd birth anniversary. Born on February 8, 1834, Mendeleev is popularly known as the “Father of Periodic Table”.

Who discovered cell?

Initially discovered by Robert Hooke in 1665, the cell has a rich and interesting history that has ultimately given way to many of today’s scientific advancements.

Who invented water?

Who discovered the water? It was the chemist Henry Cavendish (1731 – 1810), who discovered the composition of water, when he experimented with hydrogen and oxygen and mixed these elements together to create an explosion (oxyhydrogen effect).

Who Discovered of carbon?

It was first recognized as an element in the second half of the 18th century. Name: A.L. Lavoisier proposed carbon in 1789 from the Latin carbo meaning “charcoal.” A.G. Werner and D.L.G. Harsten proposed graphite from the Greek grafo meaning “to write,” referring to pencils, which were introduced in 1594.

Who invented nitrogen?

Nitrogen is the chemical element with the symbol N and atomic number 7. It was first discovered and isolated by Scottish physician Daniel Rutherford in 1772.

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