helium is a noble gas, has completely filled orbitals and is chemically inert.
calcium is an alkaline earth metal, has two valence electrons and is reactive.
Helium is unreactive.
Helium (He) and Calcium (Ca) both have 2 valence electrons.
No. Calcium carbonate and calcium acetate are two different compounds.
Calcium (Ca) has two valence electrons.
Air has many more different substances than helium, which is a single substance. Outside air contains helium.
Helium
Helium
Helium.
The mass of a calcium atom is around 40 atomic mass units (u), while the mass of a helium atom is around 4 atomic mass units (u). Therefore, the mass of a calcium atom is 10 times greater than the mass of a helium atom.
Helium
Awesoem
Hydrogen, helium, carbon dioxide, and calcium.
Hydrogen, helium, carbon dioxide, and calcium.
5
no. they are different. helium is a gas and is different from solid.
Helium is unreactive.
Helium (He) and Calcium (Ca) both have 2 valence electrons.