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What is the atomic number of the lightest element?

The atomic number of the lightest element is 1, which corresponds to hydrogen.


What is the lighest of all the elements?

Hydrogen is the lightest element, with an atomic number of 1. Its low atomic mass and simple structure make it the lightest element in the periodic table.


What id the lightest of all the elements and has the atomic number 1?

Hydrogen, the most common element in the universe.


What is lightest of all elements?

Paleoclimatolinium;A form of hydrogen with no protons, neutrons....... only electron and cloud is present.hydrogenHydrogen is the lightest element in the Periodic Table.See the Related Questions link for more information about hydrogen.


Is hydrogen the lightest element on the periodic table?

hydrogen has the least mass of all the elements, so yes in a way, it is.


Which is the lightest substance among these four 1oxygen 2nitrogen 3hydrogen 3carbon?

Hydrogen is the lightest substance among these four elements. It has the lowest atomic number and atomic weight, making it the lightest element on the periodic table.


Which is the lightest element known is?

The lightest element known is hydrogen. It is the first element in the periodic table and has an atomic number of 1, making it the simplest and lightest element in the universe.


What is the 2nd lightest element?

Helium is the second lightest element on the periodic table, with an atomic number of 2 and an atomic weight of approximately 4.0026 atomic mass units.


What is the lightest of all the elements and has the atomic number 1?

Hydrogen


What is the lightest metal element?

The lightest metal element is lithium, with an atomic number of 3 and an atomic weight of around 6.94. It is also the lightest metal that is a solid at room temperature and is commonly used in batteries and other electronic devices.


Which of these is the lightest chemical element?

Hydrogen is the lightest chemical element. It has an atomic number of 1 and is the most abundant element in the universe.


What is the fourth lightest element on the periodic table?

The fourth lightest element on the periodic table is beryllium, with an atomic number of 4.