3. Explain the statement , Matter and radiation have “dual nature.”

Q: Explain the nuclear theory of the atom ?

A: Atom is the smallest, tiny indivisible particle of any matter. There are three fundamental subatomic…

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

A:

Q: 4. What are the main ideas in the nuclear theory of the atom?

A: The main ideas of nuclear theory of an atom has to be given. The atomic model of Rutherford is also…

Q: Aluminum has 13 electrons, 13 protons and 14 neutrons a) What is its atomic mass? b) What is its…

A: The atomic number of aluminium is = 13 The number of protons in the aluminium is = 13 The number of…

Q: why the discovery of noble gases was late?

A: The discovery of noble gases was late.

Q: On a remote island in the Arctic Ocean, a scientist claims to have found a new element (Excitinium)…

A: Given: On a remote island in the Arctic Ocean, a scientist claims to have found a new element…

Q: What are the major postulates of Dalton's atomic theory

A: Here we have to write the major postulates of Dalton's atomic theory-

Q: Explain the Components of Atoms?

A: The smallest and fundamental unit of matter, which leads to formation of chemical element is atom.…

Q: process

A: Dear student I have given answer to your question in the image format.

Q: List the basic postulates of Dalton’s atomic theory.?

A: The structure of matter is explained by the experimental facts known at the time John Dalton in the…

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: Ultraviolet light rays can be harmful and helpful to humans. O True O False

A: The Ultraviolet light is high energy radiation having energy greater than visible light.

Q: Illustrate the quantum concept applied to matter and energy.

A: The quantum concept applied to matter and energy has to be illustrated below.

Q: what is X-Ray ? what is use of it?

A: X-ray is an electromagnetic radiation having wavelength between 0.01 to 10 nm. They are produced…

Q: Write Postulates of Dalton’s atomic theory.

A: Atoms and molecules are the building blocks of matter. Various experiments performed to find out the…

Q: W+5 how many electrons

A: The symbol of Tungsten is "W" Atomic Number of Tungsten (W) =74

Q: Which elements are most likely to have properties that are similar to the properties of F?

A: Br and Cl have the similar properties like Fluorine. Because F is the member of 17 group in the…

Q: 5. Which one of the following statements about atomic structure is false? A An atom is mostly empty…

A: Atom is made up of three fundamental particles that is electron proton and neutrons .

Q: explain the concept of penetration and shielding. Make reference to energy.

A:

Q: How did Max Planck explain the fact that metal will glow different colors when heated?

A: Max Planck has studied the emission of light by means of hot objects. He observed a heated metal…

Q: what group in the periodic table would an element with atomic number 112 belong?

A: • We need to determine the group in the periodic table would an element with atomic number 112…

Q: Which of the following does have the largest size?

A: In the periodic table,  Top to bottom atomic size increases,  while left to right atomic size…

Q: 9. What observations in the gold foil experiment made Rutherford conclude that atoms are mostly…

A: 9. The answer is option no. (B) Most alpha particles passed through the gold foil undeflected. 10.…

Q: Atoms of a specific element that have the same number of protons but a different number of neutrons…

A: An atom is made up of protons, neutrons, and electrons. Protons and neutrons together called…

Q: 4.40 Two isotopes of rubidium occur naturally, Rb and Rb. Which isotope of rubidium is more…

A: Average atomic mass of Rb = 85.47 Let percentage abundance of 85Rb = x and percentage abundance of…

Q: 1.1 The characteristic wavelengths of light absorbed by and emitted from an atom is known as the…

A: An atom changes from ground state to excited state by taking energy of surroundings.Its called…

Q: The characteristic wavelengths of light absorbed by and emitted from an atom is known as the atom's:

A: The characteristic wavelengths of light absorbed by and emitted from an atom is known as the atom's…

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: 3. It is important to learn about quantum mechanics because: A. This information tells us why…

A: In the quantum mechanical model, electrons exist in discrete energy levels and they do not move…

Q: what are 2 incompatible elements? are calcium and chlorine incompatible?

A: Rubidium, Barium, Uranium, and Lanthanum are incompatible elements.

Q: 18. (a) What did Ernest Rutherford observe during his experiments? (b) What did Niels Bohr observe…

A: The observation of Rutherford and Bhor experiments are as follows:

Q: Explain how Dalton’s atomic theory accounts for the law of conservation of mass?

A:

Q: Why are chemists interested in studying the orbits of the atom, why are we studying them, and what…

A: Orbital  are most important  part of atom and it govern a lot of things .

Q: Use the illustration to answer the question. What evidence supporting the nebular hypothesis is…

A: The evidence that supports the nebular hypothesis is

Q: Which atom  is the smallest? A. silicon B. carbon C. phosphorus D. nitrogen

A: We will write about the smallest

Q: Describe the basics of atomic structure, including ions and isotopes; and then how each of these…

A: Atomic structure refers to the structure of an atom comprising a nucleus (centre) in which the…

Q: Complete the following by placing the missing words correctly. The atomic theory was given by…

A: The atomic theory was given by  Dalton. Protons is a  subatomic particle . The atomic number gives…

Q: While looking at bromine (Br) on the periodic table, a student needs to find another element with…

A: The

Q: What are the two regions of an atom?

A: The two regions of an atom has to be given.

Q: The element 1s22s22p63s23p64s23d104p65s2 is    a. a halogen   b. an alkali metal   c. an…

A: Since the electronic configuration of the element given is   1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2

Q: 1. What term did Planck use to describe a "bundle" of energy? 2. Which electron possesses the…

A: "Since you have asked multiple question, we will solve the first question for you. If youwant any…

Q: Selenium is a photoconductor which means O it is an insulator in the dark and a conductor when…

A: Correct option - - > It is an insulator in the dark and a conductor when exposed to light.…

Q: Much of the evidence for the existence of atoms comes from Multiple Choice chemistry. mechanics.…

A: Atom is the smallest individual particle having its existence.

Q: Rutherford’s experiment indicated that matter was not asuniform as it appears. What part of his…

A: Rutherford’s experiment indicated that matter was not asuniform as it appears. What part of his…

Q: Which pair of elements has the most similar properties? (a) Sr and Ba                (b) S and Ar(c)…

A: To determine the pair of elements that has the most similar property. (a) Sr and Ba(b) S and Ar(c) H…

Q: (a) What do you understand by the statement: "the energy of the electrons in an atom is quantized"?…

A: Quantized energy means that the electrons can possess only certain discrete energy values; values…

Q: 2. An element that has 9 orbitals 5 fully filled, 2 single electrons and 1 empty orbital (a) What is…

A: f) Mg is a metal and can easily lose two electrons. It have properties similar to group 2 elements…

Q: How does a star produce such enormous amounts of heat and light

A: Stars are made mostly of helium and hydrogen, which are packed so tightly in a star that is the…