| No. | Atomic weight | Name |
|---|---|---|
| 1 | 1.008 | Hydrogen |
| 2 | 4.003 | Helium |
| 3 | 6.941 | Lithium |
| 4 | 9.012 | Beryllium |
Which of the following elements will have the lowest atomic mass?
Hydrogen: 1 proton and no neutrons. Nitrogen: 7 protons and 7 neutrons. Oxygen: 8 protons and 8 neutrons.
What has the highest atomic number?
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 are the 118 elements and their symbols?
118 Elements and Their Symbols and Atomic Numbers
| Name of the Element | Symbol of the Element | Atomic Number |
|---|---|---|
| Helium | He | 2 |
| Lithium | Li | 3 |
| Beryllium | Be | 4 |
| Boron | B | 5 |
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 |
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 there an element 119?
Ununennium, also known as eka-francium or element 119, is the hypothetical chemical element with symbol Uue and atomic number 119. … In the periodic table of the elements, it is expected to be an s-block element, an alkali metal, and the first element in the eighth period.
What is the heaviest element on Earth?
The heaviest element found in any appreciable amount in nature is uranium, atomic number 92. (The atomic number refers to the number of protons in an atom’s nucleus.) Beyond that, scientists must create new elements in accelerators, usually by smashing a beam of light atoms into a target of heavy atoms.
What are the first 10 elements and their symbols?
In order of increasing atomic number, the first 20 elements and their symbols are:
- Hydrogen (H)
- Helium (He)
- Lithium (Li)
- Beryllium (Be)
- Boron (B)
- Carbon (C)
- Nitrogen (N)
- Oxygen (O)
26 февр. 2020 г.
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 first 40 elements and their symbols?
First 40 Chemical Elements & Their Symbols
| A | B |
|---|---|
| Helium | He |
| Lithium | Li |
| Beryllium | Be |
| Boron | B |
What are the first 50 elements?
The first 50 Elements of the Periodic Table
| Question | Answer |
|---|---|
| H | Hydrogen |
| He | Helium |
| Li | Lithium |
| Be | Beryllium |
What are the first elements?
The first elements — hydrogen and helium — couldn’t form until the universe had cooled enough to allow their nuclei to capture electrons (right), about 380,000 years after the Big Bang.
What are 10 elements examples?
Pure Element Examples
- Hydrogen (H) – nonmetal.
- Helium (He) – nonmetal.
- Oxygen (O) – nonmetal.
- Neon (Ne) – nonmetal.
- Nitrogen (N) – nonmetal.
- Carbon (C) – reactive nonmetal.
- Silicon (Si) – metalloid.
- Magnesium (Mg) – alkaline earth metal.