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How many valence electrons do atoms in period 1 have?
Hydrogen has 1 valence electron, whereas helium has 2 valence electrons.
What element has the fewest valence electrons in period 2?
In period 2 of the periodic table, lithium (Li) has the fewest valence electrons, with only one valence electron. It is located in Group 1, which is characterized by having a single electron in the outermost shell. Other elements in period 2, such as beryllium and the nonmetals, have more valence electrons.
What element is in the same period as helium and has only one valence electron?
The element in the same period as helium that has only one valence electron is lithium. Both helium and lithium are located in Period 1 of the periodic table, with helium in Group 18 (noble gases) and lithium in Group 1 (alkali metals). Lithium has the atomic number 3 and has one electron in its outermost shell, making it highly reactive.
What element has only one valence electron give a symbol for each?
The alkali-group elements (group I of the periodic table) H, Li, Na, K, Rb, Cs, Fr in period 1 to 7 respectively.
How can you determine the number of valence electrons in an atom?
You can determine how many valence electrons an atom has by what family the element of the atom is in. For instance, if the element is in family 8A, the number of valence electrons will be 8. Or, if the element is in family 2A, the number of valence electrons for the atom will be 2. So, whatever number family the atom is in, the number of valence electrons equals that.
What is the number of valence electrons the element hydrogen has?
One.Hydrogen has only 1 electron in total, and it is also a valence electron.
How many valence electrons do atoms in period 1 have?
Hydrogen has 1 valence electron, whereas helium has 2 valence electrons.
Which element has 19 protons and 1 valence electron?
Potassium has 19 total electrons and one electron in its 4th energy level.
What element has the fewest valence electrons in period 2?
In period 2 of the periodic table, lithium (Li) has the fewest valence electrons, with only one valence electron. It is located in Group 1, which is characterized by having a single electron in the outermost shell. Other elements in period 2, such as beryllium and the nonmetals, have more valence electrons.
What element has 1 valence electron and 19 protons?
Potassium
What element is in the same period as helium and has only one valence electron?
The element in the same period as helium that has only one valence electron is lithium. Both helium and lithium are located in Period 1 of the periodic table, with helium in Group 18 (noble gases) and lithium in Group 1 (alkali metals). Lithium has the atomic number 3 and has one electron in its outermost shell, making it highly reactive.
How many valence electrons are in Lithium?
Lithium has 1 valence electron.
What has 1 valence electron but has 4 energy levels?
This elemental atom will be in (column:) group 3, or 13, and (row:) period 4: 21-Sc or 31-Ga
How many valence electrons does the element cesium have?
A cesium atom has 1 valence electron. It is an alkali metal, and all alkali metals have 1 valence electron. The electron configuration for cesium is (Rn)7s1. The single electron in the 7s sublevel is its valence electron.
If an element has 1 valence electron what group is it in?
That element would be in the Alkali Metals (group one)
How would you find valence electrons in a periodic table?
To find the number of valence electrons of an element using the periodic table, you can look at the group number of the element. The group number indicates the number of valence electrons. For example, elements in Group 1 have 1 valence electron, elements in Group 2 have 2 valence electrons, and so on.
What is the valence electron configuration of each element in group 1?
All elements in group 1 have 1 valence electron.
