13. What were the 4 ancient elements that Empedocles described? 14. List the six ideas of John Dalton's model of the atom

Q: m atom c

A: Atom is the small particle of matter and made up of three fundamental particles which are known as…

Q: How are electrons and protons similar? How are they different?

A:

Q: Describe John Dalton's atomic theory?

A: Structure of atom is the significant discovery. Different scientists has proposed different…

Q: Which of the following scientists did not contributeto determining the structure of the atom?(a)…

A: To find: The scientists did not contribute to determining the structure of the atom

Q: Describe Rutherford’s planetary model of the atom.

A: Rutherford model or Rutherford atomic model or nuclear atom, or the planetary model of atom gives…

Q: What are the main ideas in Dalton’s atomic theory?

A: Dalton was a well-known experimentalist and his significant studies on behaviours and properties of…

Q: what was johns dalton initial research focus was and what he eventually contributed to early atomic…

A: Johns dalton first introduced atomic theory in chemistry.He gave three laws.These are i-Law of…

Q: Describe the Dalton model of the atom.

A: The Dalton model of the atom has to be described below.

Q: Describe Rutherford’s gold foil experiment. How did the experiment prove that the plum-pudding model…

A: Plum pudding model was first put forth J J Thomson. According to him, the structure of the atom was…

Q: DescribeThomson’s plum-pudding model of the atom?

A: The Plum Pudding Model is given by J.J. Thomson, in 1904. J.J. Thomson had given this Plum- pudding…

Q: Describe Rutherford’s nuclear model of the atom. What was revolutionaryabout his model?

A: According to the Rutherford atomic model: The positively charged particles and most of the mass of…

Q: Describe the early Greeks' idea of the atom?

A:

Q: What are the components of an atom? How are they different?

A: The components of an atom and how are they different have to be explained below.

Q: Compare the plum pudding model of Thomson to the nuclear model of Rutherford. Describe the…

A: Plum pudding model of Thomson : In 1898, J. J. Thomson proposed the first of many atomic models to…

Q: What is Joseph Proust contribution atomic theory?

A: He first published his Law of Definite Proportions (or Law of Constant Composition). The essence of…

Q: + а. Bohr b. Dalton C. Rutherford d. Thomson 3. Which atomic model was the first to show a nucleus,…

A: 27) in the Given figure, the model of an atom was proposed by Thomson.

Q: Explain John Dalton and the Atomic Theory?

A:

Q: What most likely explains why the chemical symbol for calcium is? A. The symbol was already used for…

A: Calcium is discovered by Humphry Davy in 1808. It belongs to group 2 of the periodic table with an…

Q: What are the atomic atom and atomic mass number of the carbon isotope here in the picture here?

A: An element is represented by the symbol XZA, where Z is the atomic number and A is the mass number.

Q: What is Henri Becquerel contribution to the atomic theory? Explain in detail.

A: Answer - discovery of radioactivity in uranium by French physicist Henri Becquerel in 1896 forced…

Q: Table 1. Mass # # protons (9.) # neutrons # electrons Symbol 55 (10.) (11.) Co 40 19 (12.) (13.)…

A: Given, Mass of three atoms are provided     Required,                          Number of protons ,…

Q: True or False -Atomic theory doesn't need to be taken seriously because it's just a theory ....

A: Given statement is, Atomic theory doesn't need to be taken seriously because it's just a theory

Q: atomic theorists

A: Niels Bohr proposed a theory for the hydrogen atom based on quantum theory that energy is…

Q: The Bohr model of the atom was an important discovery that led to the modern theory of atomic…

A:

Q: Why did J.J. Thompson experiments with cathode ray tubes imply about the mass of an electron…

A:

Q: Was Democritus’s proposal of the existence of atoms based on scientific methods or ideas? Explain

A:

Q: 25. Which determines the speed of a molecule? * a. Its kinetic energy b. The amount of the molecules…

A: Multiple choice questions : 25-28

Q: What is an element?How are elements arranged in the periodic table?

A: The elements starting from hydrogen having atomic number 1 to the element with atomic number 118 are…

Q: Which scientist developed the "plum pudding" model of the atom? Spherical cloud ´of positive charge…

A: J.J. Thomson's experiments with cathode ray tubes showed that all atoms contain tiny negatively…

Q: Which scientist developed a model that is still used today to show the number of electrons in each…

A: Bohr model explains an atom as a small and positively charged nucleus surrounded by electrons. These…

Q: Match the discovery/ideas/experiment to the contributor Found evidence that the atom is mostly empty…

A: We are given ideas/experiments/discoveries related to atomic structure and we have to identify the…

Q: Design a concept map that compares and contrasts the atomic ideas proposed by Democritus and John…

A: These are different atomic theories and in next step two are explained. Ancient Greek Beliefs.…

Q: Who performed this experiment? Robert Millikan O Niels Bohr O J. J. Thomson Ernest Rutherford What…

A: Step : 1              the answers for the following multiple choice questions are as follow :

Q: accomplishments

A:

Q: What did John Dalton proposed about the atom?

A: John Dalton atomic model is a postulate that has no experimental basis.

Q: Describe Rutherford’s model of the atom.

A: To find: The description about the Rutherford's model of the atom

Q: Distinguish between Democritus’s ideas and Dalton’s atomic theory.

A: Democritus's ideas and Dalton's atomic theory both describes the nature of matter in terms of atoms.…

Q: Discovering which of the three subatomic particles proved to be the most difficult—the proton,…

A: From three subatomic particle - the proton, neutron and electrons : Answer :            The NEUTRON…

Q: The element sulfur has an atomic number of 16 and an atomic mass of 32. How many neutrons are in the…

A: Atom consist of nucleus at its center and electrons revolve around the nucleus. Nucleus contains…

Q: why Rutherford's model of an atom was considered to be unstable?

A: Rutherford’s experiment:Rutherford suggested that there is something at the center of the metal…

Q: What is modern Atomic Theory?

A: Given term, Modern atomic theory Atom - a fundamental particle of matter (i.e. anything that can be…

Q: Why Rutherford’s model could not explain the stability of an atom?

A: Models for electrons- J.Thomson in 1897 discovered electron with the help of cathode ray tube…

Q: All parts of Dalton's theory on atoms is still accepted today. O True O False

A: Postulates of Dalton’s atomic theory is shown below: All matter is made up of individual particles…

Q: In Rutherford’s planetary model of the atom, what keepsthe electrons from flying off into space?

A: To explain what is/are the things that keeps the electrons from flying off into the space in the…

Q: Draw your own concept of an atom. You may refer to the model given by Bohr for an idea of the atom…

A: