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Why is helium in group 18 in the periodic table?
We all know that helium is a noble gas. It has atomic number 2 but it is placed in 18 group be because in 1st group the elements have only one electron in thier s orbital e.g. Hydrogen, lithium, sodium, potassium etc. But helium has two electron so it cannot exist in 1 group. In second group the s orbital are same but the physical and properties of helium is different from the elements present in second group. According to modern Periodic Table elements which have same physical properties are placed in same group. Since helium is an inert gas and its physical properties are similar to the other elements of the 18 group and also helium discoverd late so that hilium can be put in the 18 group
Which elements tend to possess the same number of valence electrons?
Elements in the same group or column of the periodic table tend to possess the same number of valence electrons. For example, all elements in Group 1 (such as lithium, sodium, potassium) have 1 valence electron, while elements in Group 18 (like helium, neon, argon) have 8 valence electrons except for helium, which has 2.
Using a periodic table how would you find elements with chemical properties similar to helium?
Elements in the same group or column on the periodic table have similar chemical properties. Helium is in group 18 or the Nobel gases. Elements with similar chemical properties would be the rest of the elements below Helium Neon, Argon, Krypton, Xenon, and Radon
Why is helium normally placed in group 18?
We all know that helium is a noble gas. It has atomic number 2 but it is placed in 18 group be because in 1st group the elements have only one electron in thier s orbital e.g. Hydrogen, lithium, sodium, potassium etc. But helium has two electron so it cannot exist in 1 group. In second group the s orbital are same but the physical and properties of helium is different from the elements present in second group. According to modern periodic table elements which have same physical properties are placed in same group. Since helium is an inert gas and its physical properties are similar to the other elements of the 18 group and also helium discoverd late so that hilium can be put in the 18 group
Which atoms have the same valence as helium?
Helium has 2 valence electrons. Group 2 elements (alkaline earth metals) also have 2 valence electrons.
Do all elements of a group have the same state of matter?
No, elements in a group do not necessarily have the same state of matter. Elements can exist in different states of matter based on their temperature and pressure. For example, in Group 18 (Noble Gases), elements like helium and neon are gases at room temperature, while elements like radon can be solids.
Why is neon in the same group as helium in the periodic table?
Neon and hydrogen are not in the same group in the periodic table. Perhaps you meant neon and helium, which are in the same group. ------------------------------------- And if you did mean Helium and not Hydrogen, then Helium and Neon are in the same group because the group they are in are all elements with "full" electron shells.
What elements have the same properties as argon?
Argon is a nobel gas. Nobel gases are located in Group 18. Elements have similar properties within the same group. Argon has similar properties to Helium, Neon, Krypton, Xenon, and Radon.
What are two elements with properties most like helium?
Neon and argon, the two elements immediately below helium in column 18 of a wide form periodic table.
Why does helium not have the same number of valence electrons as helium?
Helium is a noble gas and has a full outer electron shell with 2 electrons, making it stable. It does not need to gain or lose electrons to achieve a full outer shell, so it does not have the same number of valence electrons as other elements that need to gain or lose electrons to become stable.
What is special about the elements in the same group?
elements are in the same group since they react similarly to other elements in that group.
What are the three elements in gold group?
The other stable elements in the same periodic column as gold are copper and silver.
