Among all the elements in period 2 of the modern periodic table, lithium (Li) is known to have the lowest mass. The noble gas neon (Ne) has the highest mass among all the elements in period 2.
Which element in Period 2 has the least atomic mass?
The second Period begins with lithium, whose atomic mass is 6.94 g⋅mol−1 . it ends with neon, whose atomic mass is 20.18 g⋅mol−1 .
Which element in Period 2 has the highest mass?
The element neon, in period 2, has the most mass.
What is the lightest element in period 2?
Period 2 elements involve the 2s and 2p orbitals. They include the biologically most essential elements besides hydrogen: carbon, nitrogen, and oxygen. Lithium (Li) is the lightest metal and the least dense solid element.
Which element has the smallest mass?
The elements of the periodic table sorted by atomic mass
| Atomic Mass | Name chemical element | number |
|---|---|---|
| 1.0079 | Hydrogen | 1 |
| 4.0026 | Helium | 2 |
| 6.941 | Lithium | 3 |
| 9.0122 | Beryllium | 4 |
What is the first element?
Hydrogen is known to be the first element in the periodic table of elements. It has one proton in its nucleus and one outter electron. It is a very light gas and also flammable. Hydrogen, H, is the lightest of all gases and the most abundant element in the universe.
What are the first 30 elements?
The first 30 elements of the periodic table and their symbols
| A | B |
|---|---|
| Lithium | Li |
| Beryllium | Be |
| Boron | B |
| Carbon | C |
What number increases from 3/10 to Period 2?
In the periodic table, atomic number increases from 3 to 10 in period 2. Explanation: Atomic numnber is the total number of protons present in an atom. And, when we move across a period then there occurs an increase in atomic number of the elements.
What is the period for nitrogen?
| Nitrogen | |
|---|---|
| Period | period 2 |
| Block | p-block |
| Electron configuration | [He] 2s2 2p3 |
| Electrons per shell | 2, 5 |
What is period 2 on the periodic table?
Period 2 is the first period in the periodic table from which periodic trends can be drawn. … All period 2 elements completely obey the Madelung rule; in period 2, lithium and beryllium fill the 2s subshell, and boron, carbon, nitrogen, oxygen, fluorine, and neon fill the 2p subshell.
Which is the lightest element in the world?
Hydrogen is the lightest element and exhibits the simplest atomic structure. In addition, it is the most abundant element in the universe and can form bonds to nearly every element, such as s- and p-block elements.
Which is the lightest gas in the world?
Hydrogen is the lightest, most abundant and explosive gas on Earth. The atomic weight of Radon is 222 atomic mass units making it the heaviest known gas. It is 220 times heavier than the lightest gas, Hydrogen.
Which element is the lightest and at the same time?
Answer. Explanation: H2, is an elemental gas with an atomic mass of 1.00794. This diatomic molecule is the lightest and most abundant element in the universe.
Which element would be the smallest?
Thus, helium is the smallest element, and francium is the largest.
What do you call the element from atomic number 57 71?
What do you call the element series from atomic number 57-71? Silicon.
What element has the largest atomic mass?
Oganesson has the highest atomic number and highest atomic mass of all known elements. The radioactive oganesson atom is very unstable, and since 2005, only five (possibly six) atoms of the isotope oganesson-294 have been detected.