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Which group does helium belong to?Helium (from ἥλιος helios, meaning "sun" in Greek), chemical element with symbol He and atomic number 2. It is a gas in the first period group 8A of the periodic table.
Why does the ionization energy decrease from top to bottom?The reason why it increases when moving from left to right is due to the electric attraction force. As you go from left to right, the nuclear charge increases and the ionization energy increases in the same direction. As you move to the right, the ionization energy increases and the atomic diameter decreases proportionally.
Which group does hydrogen belong to?
1. Group (IA,IA): family of alkali metals, hydrogen or lithium.
What structure does helium have?– It is an element that does not react with oxygen. – Its crystal structure is hexagonal. – Small in molecular structure, helium has high energy.
Why does electron affinity decrease from top to bottom?Since the energy to be given to remove the electron from the nucleus will depend on the distance of the electron from the nucleus, the ionization energy decreases as the atom size increases when you go down in a group.
Is the ionization energy decrease as you go down in a group?
This means that the valence electrons move away from the nucleus, and they are less attracted by the nucleus compared to other electrons. Therefore, as you go from top to bottom in a group, the diameter increases, while the ionization energy decreases.
What kind of element is hydrogen?Hydrogen is a nonmetallic substance. Its symbol is denoted by H. A diatomic gas that has no color, no odor and no temperature is called hydrogen. Hydrogen is the lightest element among all elements.
Is H2 in molecular structure?Hydrogen has an atomic number of 1, so it has 1 electron. This electron is in the 1s orbital. The H2 molecule is formed from the interaction of an electron in two hydrogen atoms, the bond between them is a covalent bond. The hydrogen molecule is represented as H• •H or H–H.
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