. Investigate the history of the discovery of chemical elements. What was the most recent element to be discovered and how was it found? How many elements occur in nature and how many are man-made?

Q: Is the statement consistent with Dalton’s atomic theory as it was originally stated? Why? Sulfur and…

A: Concept introduction: Dalton's atomic theory was the first complete attempt to describe all matter…

Q: Complete the table

A: Electrochemical cells / Galavanic cells / Voltaic cells :  In these cells chemical energy is…

Q: Is the statement consistent with Dalton’s atomic theory as it was originally stated? Why? All cobalt…

A: Dalton’s atomic theory  All matter is made of atoms. Atoms are indivisible and…

Q: 58. Which elements are alkaline earth metals?(a) rubidium(b) tungsten(c) magnesium(d) cesium(e)…

A: The six chemical elements which are present in the second group of the periodic table are known as…

Q: Is the statement consistent with Dalton’s atomic theory as it was originally stated? Why? Lead atoms…

A: Given, Lead atoms can be converted into gold.

Q: complete the table

A: If organic compound contains double bond (or) triple bond (unsaturation) reacts with Br2 , this…

Q: What are the 50 elements and their symbols?

A: An atom is the basic and fundamental unit of matter. An atom consists of electron and the nucleus in…

Q: Give the number of protons and neutrons in X. 33- Express your answers as an integers. Enter your…

A: 1) The isotope given is 7433X.

Q: How are the concepts of an atom and an element related? What causes elements to differ?

A: A particular atom will have the same number of protons and electrons and most atoms have at least as…

Q: From the information in this chapter on the mass of the proton, the mass of the electron, and the…

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Q: Where have you seen elements, atoms, ions, etc in real life? Where did you see them and what were…

A: Elements present in the periodic table can be seen all around us in our day to day life.  Elements…

Q: 10:51 1 l LTE [cK-12 License 13. The atoms in the air are called. , and they are very a. noble…

A:

Q: Boron (BB)  has two naturally occurring isotopes: BB-10, which has a percent abundance of 19.88 %%…

A: The above mentioned question is explained below :

Q: Search the web or your textbooks for an illustration of Mendeleev’s periodic table. How many…

A: Given : Mendeleev periodic table  To find : Describe it properly Solution : There are thousands of…

Q: What are the observations and conclusions drawn  by J.J. Thomson while conducting experiments with a…

A: J. J. Thomson developed a glass tube that was partially evacuated, meaning that the building's air…

Q: In the table below, there are descriptions of an experiment on samples of three different chemical…

A: Given that : We have to identify whether the elements are metal or non-metal form the given…

Q: can you take a look at two elements located into different corners of the Periodic Table - Lithium…

A: An atom is composed of three main sub-atomic particles; electrons, neutrons and protons. The atomic…

Q: Describe why "new" elements (man-made elements) are created, or why do we benefit in creating them?…

A:

Q: How has the understanding of the structure of the atom changed over time? Briefly describe the…

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Q: Is the statement inconsistent with Rutherford’s nuclear theory as it was originally stated? Why? A…

A: Given statements, A phosphorus atom has 15 protons in its nucleus and 150 electrons outside of its…

Q: he most abundant elements in our food and drinks are oxygen, carbon, hydrogen and nitrogen. Why is…

A: The food contains carbohydrates, proteins, vitamins, fats and many more minerals in it.…

Q: Why is it important to study atomic theory?

A: Matter is composed of small particles . Atomic theory tells about the particles and refereed them as…

Q: The radius of a tantalum atom is 142 pm. How many tantalum atoms would have to be laid side by side…

A: Given: Radius of tantalum atom = 142 pm And total distance given = 2.85 mm.

Q: What do all isotopes of an element have in common? How do they differ? Provide an example to explain…

A: Each element of the periodic table has an atomic number and mass number. The atomic number is…

Q: Calculate the average atomic mass of oxygen using the following data: (Leave your answer in 3…

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Q: Compare the amount of copper predicted in part A with the amount measured in part B. What percentage…

A: Predicted copper amount=0.9918 Actual amount of copper produced= 0.72

Q: 2. Consider the element Uranium, U. Determine which isotopes are naturally occurring. Look up the…

A: The average atomic weight from the given mass number and natural abundance of each isotope of the…

Q: The uranium atom is the heaviest of the common naturally occurring elements but uranium is not the…

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Q: Complete the table.

A: Given equation is : Also, Rate of reaction = 0.010 M/s

Q: What are isotopes? What is the percent natural abundance of isotopes?

A: Isotopes are stable as well as radioactive in nature.

Q: Explain how Dalton’s atomic theory offered a convincing explanation of the observation that mass is…

A: The parameter by which Dalton's atomic theory provided appropriate explanation of observation that…

Q: Last, need help with question Number 5

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Q: use models to study atoms?

A: Atom is defined as the basic building block of matter. All matters in any form either solid ,liquid…

Q: The natural abundances and isotopic masses of the element neon (Ne) areIsotope               %…

A: Average atomic mass is equal to the product of % abundance and isotopic mass. Average atomic mass is…

Q: 5) Elements in the last column of the periodic table are called, 6) What distinguishes one element…

A: 5. Elements in the last column of the periodic are called Noble gases 6. The atoms of the element .…

Q: explain how the development of the Atomic Theory illustrates the Nature of Science. Support your…

A: It is asked to explain the development of atomic theory illustrating the nature of Science.

Q: Are you satisfied knowing that man can recreate an element using technology? Justify your answer​

A: The term "man-made elements" refers to substances that do not occur naturally on the earth.  A new…

Q: What did the scientists who are credited with discovering the proton and neutron have in common?

A: Solution Ernest Rutherford determined that his scintillation detectors detected gas nuclei once a…

Q: What is the mass of 1.6 x 1021 neon atoms?

A:

Q: The radius of a tantalum atom is 142 pm. How many tantalum atoms would have to be laid side by side…

A: The radius of tantalum atom =142 pm=142 x 10-12 m 1 pm = 10-12 m Diameter of tantalum atom =2 x 142…

Q: The radius of a tungsten atom is 137 pm. How many tungsten atoms would have to be laid side by side…

A: Given :- radius of tungsten atom = 137 pm  To calculate :- number of tungsten atoms in 1.99 mm

Q: Is the statement inconsistent with Dalton’s atomic theory as it was originally stated? Why? An…

A: Is the given statement inconsistent with Dalton's atomic theory as it was originally stated has to…

Q: How many electrons are in 1 coulomb?

A: Particles that reside inside an atom are called subatomic particles. These particles are electrons,…

Q: Nitrogen (N), has two naturally occurring isotopes: N-14 that has a percent abundance of 99.63 % and…

A: The atomic mass of Nitrogen = ( mass of N-14 X percent of N-14 + mass of N-15 X percent of N-15) /…

Q: Which statements are true? A. There are 11 elements represented in the periodic table by letters…

A:

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.