According to the Thomson's Plum Pudding Model of an atom, the structure of an atom is similar to a chocolate chip cookie where the electrons can be represented as the chocolate chips and the positive charge as dispersed in the rest of the cookie. (2024)

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What is the atom like according to the plum pudding model? ›

Thomson proposed the plum pudding model of the atom, which had negatively-charged electrons embedded within a positively-charged "soup." Rutherford's gold foil experiment showed that the atom is mostly empty space with a tiny, dense, positively-charged nucleus.

According to the Thomson's Plum Pudding Model of an atom, the structure of an atom is similar to a chocolate chip cookie where the electrons can be represented as the chocolate chips and the positive charge as dispersed in the rest of the cookie.

The Plum pudding model is like raisins embedded in a pudding. These raisins are negatively-charged atoms embedded in a positively charged. This model is used to represent the structures of matter. According to this model, a substance contains small spheres having a 10 10 ^{10} 10 m diameter.

The model compares the positive sphere of the atom to a plum pudding, where the negatively charged electrons are embedded in the positively charged matter, just like raisins in a plum pudding. Therefore, the correct option is "An atom consists of positively charged matter that contains negatively charged particles."

Thomson realized that the accepted model of an atom did not account for negatively or positively charged particles. Therefore, he proposed a model of the atom which he likened to plum pudding. The negative electrons represented the raisins in the pudding and the dough contained the positive charge.

The Plum Pudding model states that charge and mass is spread throughout the atom. An idea that electrons are spread within a mass of positive charge. Rutherford carried out an experiment where he fired high energy alpha particles at gold foil and observed the scattering of the particles.

The plum pudding model suggested that mass and charge were evenly spread throughout the atom. It was expected that the particles would be scattered evenly by the atoms.

The plum pudding model, proposed by J.J. Thomson, depicted the atom as a large, positively charged sphere with negatively charged electrons embedded within it, similar to plums in a pudding. This model suggested that an atom is neutral due to the balance of positive and negative charges.

Popularly known as the plum pudding model, it had to be abandoned (1911) on both theoretical and experimental grounds in favour of the Rutherford atomic model, in which the electrons describe orbits about a tiny positive nucleus.

This model was known as plum pudding model because it consisted of electrons surrounded by positive charge to balance the electrons negative charges like negatively charged plums surrounded by positively charged pudding.

Is Thomson's atomic model proved to be accurate? ›

Flexi Says: No, Thomson's atomic model, also known as the "plum pudding" model, is not largely accepted today. It was replaced by Rutherford's nuclear model, which was further refined by Bohr's atomic model. The currently accepted model is the quantum mechanical model of the atom.

Thomson's model was a solid sphere similar to Dalton's model BUT Thomson added negative particles (electrons) embedded in the sphere. How did the new model of the atom differ from the previous model? Thomson's new model had a negative particles called electrons.

The plum pudding model

To explain the two types of static electricity, he suggested that the atom consisted of positive 'dough' with a lot of negative electrons. stuck in it.

If the plum pudding model had been correct then all of the fast, highly charged alpha particles would have whizzed straight through undeflected. The scientists were very surprised when other things happened: most of the alpha particles did pass straight through the foil.

According to the postulates of Thomson's atomic model, an atom resembles a sphere of positive charge with electrons (negatively charged particles) present inside the sphere. The positive and negative charge is equal in magnitude and therefore an atom has no charge as a whole and is electrically neutral.

Based on all his observations, Dalton proposed his model of an atom. It is often referred to as the billiard ball model. He defined an atom to be a ball-like structure, as the concepts of atomic nucleus and electrons were unknown at the time.