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Q: What element is in the same period as helium and has only one valence electron?
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Which element has 1 valence electron and is in period 1.?

The element with 1 electron in period 1 would be hydrogen.


How many valence electrons do atoms in period 1 have?

Hydrogen has 1 valence electron, whereas helium has 2 valence electrons.


Which Element Has One Valence Electron And Is In Period 4?

The element would be potassium (K).


Which p-block element has 4 valence electron and is in the third period?

Silicon is p-block element. It has 4 valence electrons. It is present in group-14.Titanium has 4 valence electrons. It is in the third period. Titanium is a metal element.


What element has 2 electron shells and 4 valence electrons?

Two electrons imply that the element is in the second period. The 4 valence electrons says that it is located in group 4A (or group 14 in modern notation). Hence, this element is carbon.The element has 2 electron shells means the element is in the 2nd group. This element is carbon. It has 4 valence electrons.


In group 8 on the Periodic Table what element does not have 8 valence electrons?

Helium. It has 2 electrons in its single shell.


What is the element in period 3 with 6 valence electrons?

Selenium. As you go across the groups, not counting the transition metals, a valence electron is added.


Have two valence electrons and get to a stable electron configuration by using two electrons?

an element with 2 valence electrons can obtain a stable electron configuration by "kicking out" two electrons to have the same electron config as the noble gas in the previous period


Is helium an element mixture or compound?

Helium is an element. It is a noble gas. It is in the 18th period.


What is the relationship between the electron configuration of an element and the period in which that element appear in the periodic table?

Electron configuration is the arrangement of elements according to their increasing atomic numbers whiles period is the arrangement of elements according to the increasing number of valence electrons.


How many electron shells and how many valence electrons are in an atom of an element found in period 3 and group 16 of the periodic table?

This element is sulfur; the electron configuration of sulfur is [Ne]3s23p4. Sulfur has three electron shells cotaining 2, 8 and 6 electrons. The last six are valence electrons.


What element has 2 shells and 3 valence electrons?

First of, Valence electron ground state is the number at the end of a Electron configuration in period 2 which goes across (from left to right) you see that each element has 2 numbers on the electron configuration ex Li 2-1 Be 2-2 B 2-3 C 2-4 notice that the ground state (which is the last number is in the secoond shell (I THINK)