circles represent helium atoms; the dark circles represent argon atoms. Select one: a. b. d. It is impossible to determine from the information given. e.

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: Calculate number of protons, neutrons and electrons present in isotopes of 35Chlorine and…

A: Atomic number = Number of protons Atomic mass  = number of protons + number of neutrons. Number of…

Q: Calculate the number of atoms in sample. 5.18 g P

A: To calculate the number of atoms of 5.18 g P is given below as; The atomic mass of P is 30.97 g/mol…

Q: Use chemical symbols together with atomic number and massnumber to express the subatomic composition…

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

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: State the main points of Dalton’s atomic theory using your own words. Which parts of Dalton’s theory…

A: Introduction: John Dalton, in the year 1808, put forward his atomic theory on the nature of matter.…

Q: How many electrons make up 0.75 coulomb of charge?

A: The charge of electrons is quantized. The charge on one electron is given by: charge on one electron…

Q: symbols of each atom,

A:

Q: Calculate the atomic mass of of sulfur if 95.00% of all sulfur atoms have a mass of 31.972 amu,…

A: Average atomic Mass: It is calculated for elements having isotopes. Isotopes: The elements which has…

Q: Based on the Rutherford model, which charged particles of an atom are easily transferred on rubbing…

A: Rutherford model is also called an atomic model or nuclear model or planetary model of an atom.

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

A:

Q: When Rutherford’s coworkers bombarded gold foil with α particles, they obtained results that…

A: The Rutherford’s experiment established about the alpha particles bombarded with gold foil.…

Q: How Many Nuclei Can Reasonably Bear The Charge In Each Of The Following lons?

A: In order to find the number of nuclei (or atoms) that can reasonably bear the charge in each of the…

Q: Why were the results of Rutherford's gold foil experiment surprising? Oa. They demonstrated that the…

A: Ruderford does the gold foil experiment with bombardment of alpha particles over it.

Q: Can you figure out why most of the α-particles in Rutherford's experiment went through gold foil…

A: Rutherford's experiment is to determine the structure of an atom where Rutherford used alpha…

Q: Use an example to explain why we say that an atom is thesmallest unit of a substance

A: Atom It is smallest particle unit of matter that retains all chemical properties of the element. It…

Q: Imagine that you were working in the lab at Amgen (a biotech compan Thousand Oaks) and you discover…

A: Isotopes of elements contains same number of protons but different number of neutrons.

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: The element stramonium (Sa, average atomic mass 628.23 u) reacts with the element kingsine (Ks,…

A: Mass of one molecule of SaKs7 = ( average atomic mass of Sa )+ ( 7 X average atomic mass of Ks )…

Q: Define atomic number, mass number, isotope, atomicmass, and mole.

A: Anything that occupy space and has mass is called matter which  is made up of atoms. Atoms are…

Q: What is atomicity

A: Atomicity is a term which is used to represent the number of atoms present in any molecule or…

Q: How much (in atomic mass units, amu) would 78 atoms of an element with atomic mass 107.18 weigh?…

A:

Q: When Rutherford’s coworkers bombarded gold foil with a particles, they obtained results that…

A: Thomson model of atom is known as plum-pudding model. Based on Thomson model of atom, the atoms are…

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: 1. Johanne Dobereiner noticed that when the elements in the atomic mass, the mass of the middle…

A: As you have posted a question with multiple parts, we will solve the first three subparts for you.…

Q: ow many protons does aluminum (Al) have? How many neutrons? How many electrons?

A: Aluminium  atomic number = 13  Electronic  configuration  of aluminium = 1s22s22p63s23p1

Q: A cube of gold that is 1.00 cm on a side has a mass of 19.3 g.A single gold atom has a mass of 197.0…

A: Atoms are packed orderly in a defined crystal lattice that is assumed to have any shape such as…

Q: a certain compound is made up of 2 chlorine atoms, one carbon atom, and one oxygen atom. What is the…

A: A chemical formula is defined as the composition of elements present in the compound in a fixed…

Q: Atoms differ from ions in number of

A: Atoms are neutral; they contain the same number of protons as electrons. an ion is an electrically…

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: 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 refinement had to be made in Dalton’s atomic theory to account for Gay Lussac’s results on…

A: Dalton's atomic theory was based on law of relative masses, but the masses of chemical compounds in…

Q: The following diagram is a representation of 20 atoms ofa fictitious element, which we will call…

A: Given data: Total number of atoms in box = 20 Number of red balls (293 NV) = 12 Number of blue balls…

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: Given Element Your Chosen Element Molecul Chemical ar Name Formul a Name Chemica Valence Name…

A: Solution: The completed table are shown below with details --- Given Element Your Chosen…

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 charge and mass of?:  a)  a singly ionized sodium atom, Na2+ (??????: 2311??, ????=…

A:

Q: According to the law of conservation of matter, what happens to the atoms in a chemical reaction?…

A: (a) The atoms are rearranged with no loss in mass

Q: ne average atomic mass

A:

Q: Describe the transformation A to B C to D and D to E Black Balls are carbon, white balls are…

A: Stereoisomers are the compound that has same chemical formula but different arrangement of the atoms…

Q: The average mass of a carbon atom is 12.011.  Assuming you were able to pick up only one carbon atom…

A: The average mass of a carbon atom is 12.011. There are three isotopes of carbon. C-12, C-13, and…

Q: What are the most common charges for magnesium and oxygen?  What would you expect the ratio between…

A: When electrons added to an atom it gets negative charge and when electrons are removed from an atom…

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: The diameter of a carbon atom is 1.54 A° . (a) Express thisdiameter in picometers. (b) How many…

A: (a)

Q: 6. Briefly explain (i) Thompson Experiment OR (ii) Rutherford Experiment emphasizing the…

A: After the discovery of cathode ray, various experiment on cathode ray was conducted to know the…

Q: In Rutherford's gold foil experiment, a very small number of α-particles were deflected, what about…

A: Given  Statement of Rutherfold's gold foil experiment = deflection by small number of alpha particle…

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.