Which of the following elements is  NOT a noble gas at room temperature?  a. chlorine b. oxygen c. neon d. argon e. nitrogen

Q: Determine what was wrong with Dalton’s theory andprovide the most recent version of the atomic…

A: Dalton's theory is one of the theories that were given for having a close view of the structures of…

Q: A certain element contains one atom of mass 10.013 ufor every four atoms of mass 11.009 u. Compute…

A: Given data contains, Mass of first isotope is 10.013 u. Mass of second isotope is 11.009 u.

Q: Draw Dalton's model of atom

A:

Q: Describe and illustrate Dalton's Model, Thompson's Model, and Bhor's model of the atom.

A: Thompson's Model: J. J. Thomson performed experiments studying cathode rays and discovered that they…

Q: how would you describe the elements from group 1 to group 12 in the periodic table

A: To find: how would you describe the elements from group 1 to group 12 in the periodic table

Q: why the discovery of noble gases was late?

A: The discovery of noble gases was late.

Q: If atoms have mostly empty space, so how does matter stay strong? please explain

A: The empty space in an atom is the space where the nucleus (proton+neutron) is absent.

Q: 13. What were the 4 ancient elements that Empedocles described? 14. List the six ideas of John…

A:

Q: PROPOSE YOUR OWN MODEL OF ATOM AND WHY. WRITE A BRIEF DESCRIPTION OF YOUR PROPOSED MODEL.

A: The atoms are much smaller and can be seen by the electronic microscope and generally it has three…

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: Which of these elements form two sta oxides? A Silicon B Beryllium C Sulphur D Argon

A: Explanation : The two stable oxide of sulfur are 1. sulphur dioxide, SO2 2. sulphur trioxide, SO3…

Q: Before the experiment conducted by Ernest Rutherford, how didmany scientists envision the structure…

A: Before the experiment conducted by Ernest Rutherford, Many scientists envision the Structure of an…

Q: What are the noble gases?

A: Noble gases has to be defined.

Q: will be closest to which value? (A) 35 (B) 36 (C) 37 (D) 38

A: Isotopes are defined as same atoms having same atomic number but different mass number.

Q: hich element es each

A: Electronic configuration of element is the complete adress of electron that is electron is present…

Q: In this following activity, use the pictures of each element and your research about the properties…

A: Given : We have to arrange the given compound in the group.

Q: 1. Count the atoms for each element in the for (C:N.).N NaHCO,

A: Given molecule : first molecule :(C2N4)2N 1 mole mole of any chemical substance contains Avogadro's…

Q: The father of the Periodic Table of Elements is:  a. Cavendish b. Charles c. Mendeleev d.…

A: The father of Periodic table of elements has to be given.

Q: Use your periodic table to give an example of an element that is/has: a. A metal that is NOT a…

A: The periodic  table is first invented by mendeleev's scientists.  It is based on atomic mass of…

Q: a) Draw Bohr-Rutherford diagrams showing the formation of an ionic compound between magnesium and…

A: Ionic bond is a type of chemical bond which is stabilized by electrostatic attraction of oppositely…

Q: Helium is an inert gas, meaning that it doesn't readily combine with other elements. What five other…

A: Given, Helium is an inert gas, meaning that it doesn't readily combine with other elements.

Q: Most of the mass or weight of the atom is in

A: Correct Ans - Nucleus Most of the mass or weight of the atom is in the nucleus.

Q: What basic properties of the electron were reported with its discovery?

A: The electron was discovered by an English physicist J.J.Thomson. J.J.Thomsom performed a cathode-ray…

Q: Which of the following is the proper dot diagram for fluorine? 卡: B O Diagram A O Diagram O Diagram…

A: The solution is as follows :

Q: What model of the atom views an electron as a cloud of negative charge shaving certain geometrical…

A: We need to determine the model which views the electron according to given description.

Q: Summarize Dalton’s atomic theory.

A: John Dalton was the scientist who gathered all the old ideas he got about an atom and put together…

Q: What is the chemical symbol for the atom? How many electrons does the atom have?

A: Electronic configuration of an element describes how the electrons are distributed in various shells…

Q: He was a tax collector and the one named the term hydrogen and oxygen:  a. Mendeleev b. Cavendish…

A: Interpretation - To explain who named the term hydrogen and oxygen.

Q: Why chemists use models to study atoms?

A: An atom is composed of three component particles which are electrons, protons and neutrons.  The…

Q: What is responisble for the chemical behavior of atoms ?

A: In the given problem we have to define the chemical nature and behaviour of atom and why an atom…

Q: Illustrate Dalton's model of atom

A: According to the Dalton atomic theory, the atom is the smallest particle of a substance and it…

Q: What element will be the best conductor of electricity?

A: Electrical conductivity is a property of a substance by which it allows the passage of electricity…

Q: d. Sulfur trioxide, SO, e. dinitrogen tetroxide, N,O, f. Chlorate, CIO," (one chlorine and three…

A: The species given are SO3, N2O4 and ClO3-.

Q: A fun fact about nitrogen.

A: The fun facts about nitrogen is

Q: What is electrostatic force? Use your understanding of electrostatic force and how the number of…

A: We have to explain electrostatic force and its impact on atomic size.

Q: What are the Elements? Classify the features of elements?

A: Given term,      Elements and the features of elements classification,

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: (SHOW CALCULATIONS) A 31.9 g mass of a noble gas occupies a volume of 17.9 L at standard temperature…

A: One mole of any gas occupies a volume of 22.4 L at STP. Given: The mass of noble gas is 31.9 g, and…

Q: Discuss the development of atomic model and what experiments did scientists conducted to discover…

A: Dalton's atomic model: Postulates: All matter is made up of tiny, indivisible particles called…

Q: according to rutherford's how many electrons would be found in sulfur and bromine

A: Every atom has a nucleus, the nucleus has positively charged particles called protons and neutrally…

Q: Explain the relationship between an atoms number of electrons it’s relative stability

A: An atom contain negatively charged electrons and positively charged nucleus.

Q: Based on the bohr model explain the location of the lithium element on the periodic table. Why is it…

A: Answer

Q: The atomic radius for radioactive radium (Ra) is Density for radioactive radium (Ra) is Melting…

A: Using the appendix for the data required. Since you have not mentioned any source from where the…

Q: Why did different drops have different charges? • View Available Hint(s) Because the drops were…

A: To solve this problem we will use the given concept of Millikan Oil drop experiment .

Q: s of nitrogen

A: Since you have posted multiple independent questions in the same request, we will solve the first…

Q: The element belonging to group 15, period 3 is named

A:

Q: What is a valence electron?

A: Valence electron is the electron which takes part in the bonding with other element. They are…

Atoms and Molecules

An atom is the smallest unit of an element that possesses all the properties of that particular element. Molecules are the smallest unit of a substance that possess all the properties of that particular substance.