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A helium atom is two times heavier than a hydrogen molecule. At 298 K, the average kinetic energy of a helium atom is : Two times that of a hydrogen molecule; Same as that of a hydrogen molecule; Four times that of a hydrogen molecule; Half that of a hydrogen molecule
A helium atom is two times heavier than a hydrogen molecule. At 298 K, the average kinetic energy of a ...
Consider a helium (H e) atom that absorbs a photon of wavelength 330 n m. The change in the velocity (in c m s – 1 of H e atom after the photon absorption is Use: Planck constant = 6.6 × 10 – 34 J s, Avogadro number = 6 × 10 23 m o l – 1, Molar mass of H e = 4 g m o l – 1).
Verified by Toppr. A helium atom has no charge, which means it has an oxidation number of 0. Neutrons have no charge. Since the numbers of protons and electrons are equal, the positive charge of the protons and the negative charge of the electrons add up to zero. 2 p + + 2 e − = 0. Therefore, a helium atom with two electrons, two protons, and ...
The ionisation energy of a singly ionized helium ion is equivalent to the kinetic energy of the first orbit. Singly ionized helium atom contains only 1 electron. The energy required to remove this electron completely is called ionization energy.
A hydrogen molecule and helium atom are moving with the same velocity. Then the ratio of their de Brogile wavelength is 1) 1:1 2) 1:27 3) 2:1 4) 2:3
The nucleus of a helium atom is composed of 2 protons and 2 neutrons (the atomic number is 2 and the mass number is 4). Protons have a relative charge of +1 and neutrons a relative charge of 0, so ...
Helium is an element and this means it comprises only one type of atom, the helium atom. Furthermore, the atoms of helium have two protons each. Moreover, changing the number of protons would make helium a completely different element. The atomic number of helium is two because each helium atom has two protons. Every element has a symbol and ...
Double ionised helium atom and hydrogen ions are accelerated from rest , through the same potential difference . The ratio of final velocity of helium and hydrogen is Correct option is 1:2 -1/2
If the velocity of helium atom is 1363 ms", then the de-Broglie wavelength of helium atom at room temperature is (a) 6.6 x 10-34m (b) 4.39 x 10-10 m (c) 7.32 x 10-'m (d) 2.335 x 10-20 m Open in App Solution