How many valence electrons does lithium have?
Therefore, the correct answer is that Lithium has 1 valence electron.
Valence electrons for representative elements
Lithium has a single electron in the second principal energy level, and so we say that lithium has one valence electron.
We can understand from the above discussion that lithium as one electron in its valence shell which makes it valence electrons. Therefore, the correct answer is option [A] 1. NOTE: Lithium has only one electron in its outermost shell. To gain stable configuration it will need to gain seven electrons.
The electrons like to be in separate shells/orbitals. Shell number one can only hold 2 electrons, shell two can hold 8, and for the first eighteen elements shell three can hold a maximum of eight electrons.
How to Find the Valence Electrons for Lithium (Li) - YouTube
Now that you know your element's electron shells, finding the valence electrons is easy: just use the number of electrons in the outermost shell. If the outer shell is full (in other words, if it has eight electrons or, for the first shell, two), the element is inert and will not react easily with other elements.
Valence electrons are the electrons in the outermost shell, or energy level, of an atom. For example, oxygen has six valence electrons, two in the 2s subshell and four in the 2p subshell. We can write the configuration of oxygen's valence electrons as 2s²2p⁴.
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The number of valence electrons.
| Periodic table block | Periodic table group | Valence electrons |
|---|---|---|
| p | Group 18 (VIII or 0) (noble gases) except helium | 8 |
As its electron configuration shows, Be has 2 valence electrons located in the 2s subshell.
The number of electrons in an atom is equal to the atomic number of an element, for neutrally charged species. This means the number of electrons and the number of protons in an element are equal. Therefore, the number of electrons in oxygen is 8.
How many electrons does Li 7 have?
A lithium-7 atom contains three protons, four neutrons, and three electrons.
Lithium is an alkali metal with the atomic number = 3 and an atomic mass of 6.941 g/mol. This means that lithium has 3 protons, 3 electrons and 4 neutrons (6.941 - 3 = ~4).
Lithium – Atomic number of lithium is 3. Its electronic configuration is 2,1. So, it needs to lose one electron to attain stability and get an electronic configuration like noble gas Helium. Thus, its valency is 1.
Size of a Nucleus
This nucleus has 3 protons (which gives the nucleus a charge of +3, identifying it as the element Lithium) and 4 neutrons (giving it a total mass number of 7). Natural Lithium is made up of two isotopes: Lithium-7 (92.5%) and Lithium-6 (7.5%).
Lithium possess one valence electron. The atomic number of lithium is 3. The electronic configuration of lithium is 2,1. Was this answer helpful?
Lithium is an alkali metal with the atomic number = 3 and an atomic mass of 6.941 g/mol. This means that lithium has 3 protons, 3 electrons and 4 neutrons (6.941 - 3 = ~4).