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H-, Li+, Be2+ ions are isoelectronic with helium

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12y ago

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Related Questions

What is composed on only one type of molecule?

What is composed of only one type of molecule


Which elements have only one electron in itz orbit orshell?

hydrogen (H) and helium (He)


How many elements does helium have?

ONE, Helium is an element, not a molecule.


How many elements are in He?

Helium is one element and does not chemically react.


Why helium and magnesium are both elements and not compound?

Helium and magnesium are both elements because they consist of only one type of atom. In contrast, compounds are made up of two or more different elements chemically bonded together. Helium and magnesium exist in their pure forms as single atoms without being chemically combined with other elements.


Are hydrogen oxygen and helium elements?

Yes, hydrogen, oxygen, and helium are elements. They are all pure substances made up of only one type of atom. Helium is the second lightest element, hydrogen is the lightest, and oxygen is the third most abundant element in the universe.


What is the name for elements are only made up of one atom?

Elements made up of only one type of atom are called "pure elements" or "monatomic elements." Each element is defined by the number of protons in its atomic nucleus, giving it distinct chemical and physical properties. Examples include helium, carbon, and gold.


What is the weight of helium?

The weight of helium is very light, as it is one of the lightest elements on the periodic table. Helium has a very low density and weight compared to other elements.


What kind of element is made of only one atom water air helium or sugar?

Helium is an element made of only one type of atom. Water and sugar are made up of different types of atoms (molecules), while air is a mixture of different gases.


What makes these two elements helium and hydrogen different from one another?

They both have only ONE, the smallest, electron orbital occupied: H: 1s1 and He: 1s2


Should helium be classified as a mixture?

Helium is one of the elements of the periodic table. Helium in the shape where people can get in contact with it may have traces of other elements in it depending on the level of purity, but it's still mainly just helium and almost nothing else.


How many gases is there in helium?

Helium has only one type of gas (which is helium itself)