Answer:
1.204×10^(23)
Explanation:
Molecular weight of H2S, M = 1*2+32 = 34
weight of sample, m = 6.82 gram
now number of moles, n= m/M
n= 6.82/34 = 0.200 moles
1 mole has 6.023×10^(23) molecules of H2S.
therefore 0.2 moles of H2S will have 0.2×6.023×10^(23) = 1.204×10^(23) number of H2S molecules.
There are 54 Protons in Xe and 77 Neutrons in Xe.
Answer:
The analogy that best describes is "The planets go around the sun."
Explanation:
The best analogy that suggests that electrons moves round the nucleus in an atom is the Bohr model. According to Neil Bohr, Based on Rutherford's model, he suggested that the extra nuclear part consists of electrons.
These electrons are in the spherical orbits called shells or energy levels around the nucleus.
The nucleus is the tiny massive center of the atom.
Transition of electrons takes place from one level to another.
As mentioned above, the characteristic chemical property of a metal atom is to lose one or more of its electrons to form a positive ion. However, certain metals lose electrons much more readily than others. In particular, cesium (Cs) can give up its valence electron more easily than can lithium (Li).
