The element which has the smallest atomic mass is Hydrogen (H), which has a proton and an electron.
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 |
Which 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.
What is the element with the lowest atomic number?
Chemistry : List of Periodic Table Elements Sorted by: Atomic number
| No. | Atomic weight | Name |
|---|---|---|
| 1 | 1.008 | Hydrogen |
| 2 | 4.003 | Helium |
| 3 | 6.941 | Lithium |
| 4 | 9.012 | Beryllium |
Which is the smallest size of atom?
Answer. Helium is the atom having the smallest size. The force between the two protons and two electrons pull the electron shell closer than the lone electron and lone proton in a Hydrogen atom.
What do you call the element from atomic number 57 70?
Lanthanides are atomic numbers 57–70. Actinides are atomic numbers 89–102.
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 do you call the element from atomic number 57 71?
What do you call the element series from atomic number 57-71? Silicon.
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.
Is Element 119 possible?
Ununennium, also known as eka-francium or element 119, is the hypothetical chemical element with symbol Uue and atomic number 119. … It is the lightest element that has not yet been synthesized.
What are the first 10 elements?
Terms in this set (10)
- Hydrogen. H.
- Helium. He.
- Lithium. Li.
- Beryllium. Be.
- Boron. B.
- Carbon. C.
- Nitrogen. N.
- Oxygen. O.
What are the 1 to 30 elements?
Atomic Mass of First 30 Elements
| ATOMIC NUMBER | ELEMENT | ATOMIC MASS |
|---|---|---|
| 1 | Hydrogen | 1.008 |
| 2 | Helium | 4.0026 |
| 3 | Lithium | 6.94 |
| 4 | Beryllium | 9.0122 |
What element has 51 neutrons?
| Name | Zirconium |
|---|---|
| Atomic Number | 40 |
| Atomic Mass | 91.224 atomic mass units |
| Number of Protons | 40 |
| Number of Neutrons | 51 |
Which among i i and i has smallest size?
Answer. i+ has the smallest size.
Which has a smallest size?
Ionic size varies inversely with nuclear charge. Higher the nuclear charge, smaller the radii. Thus P5+ because of the high nuclear charge, has the smallest size.
Which has largest radius?
Since the atomic radius decreases in a period but increases down the group so Sr of group II and period V is largest in size.