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The diameter of an helium atom is 100 pico meters how many helium atoms must be placed end to end to make chain of helium atoms one centimeters long?
Wiki User
∙ 15y ago
100 million helium atoms, being the number (1.0E-2 m)/(100E-12 m).
Wiki User
∙ 15y ago
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Why is helium's position not justified in periodic table?
Helium has 2 valence electrons and it should theoretically be placed along with group 2 elements. But since helium has completely filled orbitals (as do the noble gases), it is placed along with the noble gases.
Why does helium and hydrogen does not come in agroup of periodic table?
Helium has 2 valence electrons and hydrogen has 1 electron. So, they are placed in different groups.
The pressure of a sample of helium in a 1.00 L container is 0.988 ATM What is the new pressure if the sample is placed in a 4.40 L container?
The pressure of a sample of helium in a 1.00- L container is 0.988 atm. What is the new pressure if the sample is placed in a 200- L container
What is the maximum number of electrons that can be placed in a Lewis dot diagram?
Eight, except for helium, which has a maximum of two.
Why is helium in the noble gas column of the periodic table?
Helium has two electrons which means the "valence" orbital is full, this also means that helium is not highly reactive. All of the noble gases also have filled "valence" orbitals so helium acts more like a noble gas and is placed in that column.
How many centimeters equal 1.25 meters?
125 of them, placed end-to-end, do.
Why is helium's position not justified in periodic table?
Helium has 2 valence electrons and it should theoretically be placed along with group 2 elements. But since helium has completely filled orbitals (as do the noble gases), it is placed along with the noble gases.
What gas does helium falls in.?
Helium (He) is a noble (inert) gas placed in the group 18 of the Periodic Table.Helium falls in inert gas. It is stable and non-reactive.
Why is Helium placed on the far right of the periodic table?
it is a noble gas
Why does helium and hydrogen does not come in agroup of periodic table?
Helium has 2 valence electrons and hydrogen has 1 electron. So, they are placed in different groups.
The pressure of a sample of helium in a 1.00 L container is 0.988 ATM What is the new pressure if the sample is placed in a 4.40 L container?
The pressure of a sample of helium in a 1.00- L container is 0.988 atm. What is the new pressure if the sample is placed in a 200- L container
What is the symbol for He in the periodic table?
The name of the element with symbol 'He' is Helium. It has got 2 Protons and two neutrons in the nucleus and 2 electrons moving around it. It is first in the series of 'Nobel' gases. Others being Neon, Argon, Krypton,Xenon and Radon.
What is the maximum number of electrons that can be placed in a Lewis dot diagram?
Eight, except for helium, which has a maximum of two.
What is the greatest possible number of 1 centimeter cubes that can be placed into an empty box 3 centimeters x 2 centimeters x 1 centimeter?
Six.
Why is helium in the noble gas column of the periodic table?
Helium has two electrons which means the "valence" orbital is full, this also means that helium is not highly reactive. All of the noble gases also have filled "valence" orbitals so helium acts more like a noble gas and is placed in that column.
Do two radii make a diameter?
Only if they are placed in such a way as to make a straight line ,i.e., they should be placed at 180 degrees to each other.
Why is helium all alone in the periodic table?
All of them are noble gases. they are not reacting normally.
