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An atom of helium has a mass about four times greater than that of an atom of hydrogen Which choice makes the correct comparison of the relative numbers of helium and hydrogen atoms in equal masses o?
An equal mass of helium would contain fewer atoms compared to hydrogen, as each helium atom is four times heavier than a hydrogen atom. This is because the atomic mass of a helium atom is roughly four times that of a hydrogen atom.
Does magnesium have a smaller radius than helium?
Atoms do not have a radius. A helium atom has a nucleus composed of at least two protons and maybe one or two neutrons. A magnesium atom nucleus (and every other atom on the periodic table other than hydrogen) is BIGGER than a helium nucleus. So if you look at it that way...magnesium is larger than helium
Is a helium atom larger than a neon atom?
helium as it contains 2 protons, while hydrogen only contains 1. Additionally, the orbit of the 2 electrons in a neutral helium atom would also be larger than the orbit of the single electron in hydrogen.
Why size of hydrogen ion is greater than its atom?
It is NOT greater. It is smaller. This is because the Hydrogen ion has lost its electron from the atom and is thus smaller. The hydrogen ion is a proton.
Which element is smaller?
Hydrogen is the smallest element. It has only 1 energy level. It is a gas element.
What is the diameter of the helium atom?
The nucleus of a Helium atom contains two protons and two neutrons, protons and neutrons are measured in Daltons, and a Helium atom is about 4 Daltons
How is helium atom different from a hydrogen atom?
Helium has a nuclear charge of +2 and 2 electrons in a 1s orbital. Hydrogen has a nuclear charge of +1 and just one electron in a 1s orbital. The extra charge on the nuclees means that the electrons in He are more tightly bound than in hydrogen thuis reflected in the ionization energy of 2372 kJ/mol for He and about 1312 kJ/mol for hydrogen. For helium t the "outer shell" is full, a "stable " configuration.
Why does He atom have a smaller radius than the Ne atom?
The size of an atom is not easily measured, or even described, because it does not have an exterior skin that we can measure. Atomic size is therefore generally measured by the distance between the centers of two adjacent atoms. Because hydrogen exists naturally as a covalent pair bond (H2), the centers of the hydrogen are closer together than helium atoms, which occur freely - helium atoms do not bond to each other.
What is the smallest atom?
Hydrogen is the smallest atom by mass. Helium, neon, fluorine and oxygen are smaller in size. Many calculations put the helium as the smallest atom. But a few other calculations put neon as the smallest atom!
What is the width of a silicon atom and how does it compare to other atoms in terms of size?
The width of a silicon atom is about 0.117 nanometers. In comparison to other atoms, silicon atoms are larger than hydrogen and helium atoms, but smaller than atoms like carbon and oxygen.
What occurs when Hydrogen is turned into helium?
Hydrogen undergoes nuclear fusion to form helium in a process that releases a large amount of energy. This process is the main source of energy for stars, including our Sun. The newly formed helium atom is more stable than the original hydrogen atoms.
Is a hydrogen atom bigger smaller or the same size as an oxygen atom?
Hydrogen atoms are the smallest known elements, and therefore smaller than oxygen atoms (according to atomic weight and atomic mass).
