Answer: The correct options are b and e.
Explanation:
Thomson's model was generally known as plum pudding model which says that the electrons are distributed in an atom which is similar to the plum present in pudding.
Rutherford's model was known as the gold-foil experiment. In this experiment, he bombarded alpha particles to an atom. He thought that the particles will directly pass through the atom because it has a lot of empty space in it. But to his surprise, he found that some of the particles reflected their path and some directly reflected their way. As the alpha particles carry +2 charge and positive charges repel each other. Hence, he concluded that the atom has a positive charge which is concentrated in a small area.
Hence, the correct statements are b and e.
<u><em>In metallic bonding, the valence electrons are free to move throughout the metal structure. Metallic bonding is the electrostatic attraction between the metal atoms or ions and the delocalized electrons. This is why atoms or layers are allowed to slide past each other, resulting in the characteristic properties of malleability and ductility.</em></u>
Answer:The upward spiral theory of lifestyle change explains how positive affect can facilitate long-term adherence to positive health behaviors. The inner loop of this spiral model identifies nonconscious motives as a central mechanism of behavioral maintenance.
Explanation://
The Molarity of the solution is given by:
--- (A)
But NaCl, which is a solute, is given in grams.
Therefore, first, we need to convert grams into moles.
Molecular weight of NaCl = 58.44 grams/mole.
So,
117 grams * (moles/ 58.44 grams) =
2.00 moles of NaClNow that we have moles of NaCl, plug in the values in (A):
(A) => Molarity = (2 / 2.7 ) =
0.741 moles/litreThe correct answer is:
0.741 moles/litre = Molarity
