Question

ryekcbxmb.cuestions
1. On the basis of Thomson’s model
of an atom, explain how the atom is neutral as a whole.
2. On the basis of Rutherford’s
model of an atom, which subQ atomic particle is present in the
nucleus of an atom?
3. Draw a sketch of Bohr’s model
of an atom with three shells.
4. What do you think would be the
α
observation if the -particle scattering experiment is carried out using a foil of a metal other than gold?​

Answer 1

1. Thomson proposed that the quanta of the no. of protons (positive) and electrons (negative) is same. Thus, the two charges balance each other and makes the atom electrically neutral as a whole.

2. According to Rutherford's model of an atom protons which have a positive charge are present in the nucleus of the atom. They only contain the overall mass of an atom.

3. See the file below.

4. There would be no such change. Gold dil was used because it is highly malleable and thus its easy to obtain a very thin sheet.

Answer 2

Answer:

1. On the basis of Thomson€™s model of an atom, explain how the atom is neutral as a whole? Solution : 3. According to Thomson€™s model of the atom, an atom consists of both negatively and positively charged particles. The negatively charged particles are embedded in the positively charged sphere. These negative and positive charges are equal in magnitude. Thus, by counterbalancing each other€™s effect, they make an atom neutral.

2. protons

On the basis of Rutherford€™s model of an atom, protons (positively-charged particles) are present in the nucleus of an atom.

3. In this Bohr's model of the atom, positively charged nucleus is at the centre and negatively charged electrons revolve round the nucleus in 'fixed' energy levels (n= 1,2,3) or electrons shells ( K, L, M). ( see attachment)

4. If the α-scattering experiment is performed using a foil of a metal rather than gold, there would be no change in the observations. In the α-scattering experiment, a gold foil was taken because gold is a malleable and a thin foil of gold can be easily made than foils of other metals.

hope it helps u dear