Search the web or your textbooks for an illustration of Mendeleev’s periodic table. How many elements are there in his periodic table? How does it compare with the modern periodic table?

Q: Mrs. Smith showed her class three elements and described their properties. Properties of Elements…

A: The data given is,

Q: 1. Dmitri Mendeleev was regarded as the Father of the Modern Periodic Table; did you think it is…

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

Q: the symbol of the halogen with the most electrons Express your answer as a chemical symbol. ΑΣφ ?

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Q: We experimented on various elements: Mossy Zinc, Aluminum Turnings, Copper Turnings, Activated…

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Q: (T/F) The atomic number of an elements tells us the number of protons and neutrons in an element.…

A: Hii there, since there are multiple sub parts posted. We are answering first three sub parts. If…

Q: Change 1 Change 2 Change 3 Change 1 is: Change 2 is: Change 3 is: impossible impossible impossible a…

A: Applying definition of physical and chemical changes. A change which provides new matter is chemical…

Q: 17. Sergio's teacher gave him a sample of a substance to identify. His teacher told him it is either…

A: Metal are hard , shiny, magnetic , and a good conductor of electricity .

Q: Chlorine is a halogen (Table 2.3). Locate this element in the periodic table.(a) What is its…

A: Chlorine is a halogen. Chlorine is the second halogen in the periodic table. It lies before the…

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: The astronaut then measures the abundance of silicon on the new planet, obtaining the following…

A: Isotopes are defined as the ones which have same atomic number but different mass number. Atomic…

Q: Create a diagram to trace the development of the modern periodic table based on the observations on…

A: Hello. Since your question has multiple parts, we will solve the first question for you. If you want…

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 a mass spectrometer in 50 words (or formulas or chemical equations, etc) or less.

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

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

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Q: 1.Which of the following elements is not an alkali metal? a. Li b. Na c. K d. P

A: Note : As per our guidelines , we are supposed to answer first question please resubmit the other…

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 and compare it with modern periodic…

Q: Approximately how many elements are listed in the periodic table? How many can be found in nature?…

A: Periodic table of elements is arrangement of elements in tabulated form. In this, the elements are…

Q: 2.1. In the following drawing, the green spheres represent atoms of a certain element. The purple…

A: Hey there thankyou for the question.    By law of constant proportion all samples of a pure compound…

Q: Which of the following statements is NOT correct according to Dalton's atomic theory? O A. A sample…

A: Dalton is the name of the scientist who gave Dalton's atomic theory.

Q: Sample of Substance X Change 1 Change 2 Change 3 Change 1 is: Change 2 is: Change 3 is: O impossible…

A: Physical changes are those changes in which only Physical state of matter change, while their…

Q: 2. Water is made of two elements, hydrogen, and oxygen. What possible elements could substitute for…

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Q: When trying to identify an unknown element, a scientist determines what other elements the unknown…

A: To identify the unknown elements, its chemical properties should be studied.  Chemical properties…

Q: 1. The following substances will be used or observed in this experiment. Provide the chemical…

A: Elements contain only one atom and compounds contain more than one kind of atoms. Metals are…

Q: Which of the following could describe an element?   I II III All of them None of them

A: Matter: Matter can be defined as any component which occupies space and has mass.

Q: the history of the discovery of hydrogen and what properties they observed to identify it

A: Position of hydrogen in periodic table:   Hydrogen is regarded as rogue / disputable element because…

Q: 1. Which is true about the Law of Conservation of Mass? 3. What was one of the tests that Lavoisier…

A: 1. D. Atoms cannot be created or destroyed, only rearranged. The Law of Conservation of Mass implies…

Q: Based on the information in the table, Sample 3 would likely be classified as a(n) —    alkali…

A: Alkali metals , valance band conduction band overlap on each other . Thus free electrons  can easily…

Q: . Investigate the history of the discovery of chemical elements. What was the most recent element to…

A: History of the discovery of chemical elements: The discovery of the 118 chemical elements known to…

Q: A. TRUE OR FALSE. Write T before each number if the statement is correct statement is incorrect. anu…

A: Note : As per our guidelines ,we are supposed to answer only first question (Section A) ,Kindly…

Q: In the early 1800s, an English school teacher, John Dalton, proposed six postulates on what an atom…

A: Atom can be divid example  Proton neutron electron  Isotope are present so same element can have…

Q: 1. Describe the periodic table, 2. 3. Where are the alkali metals and the halogens located on the…

A: #1: A periodic table is a tabular arrangement of elements in form of rows and columns in increasing…

Q: Describe the Millikan oil drop experiment in 50 words (or formulas or chemical equations, etc) or…

A: Millikan oil drop experiment was performed to find out the charge of a electron.

Q: Which of the following was not postulated by Dalton? Group of answer choices A, Atoms of one element…

A: The Dalton atomic theory was the first attempt to describe the structure of an atom. According to…

Q: Calculate the mass of a gold-197 atom using the information from question 9 and the masses of the…

A: The ratio of mass to the volume of the solution is known as density.

Q: Is the underlined part of the macroscopic domain, or the microscopic domain of chemistry ? A carbon…

A: The term macroscopic refers to the objects that can be seen by the naked eyes. Macroscopic is just…

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

A: Properties of metal  •  Lustrous  • High melting point and boiling point.  • Malleable - They can be…

Q: Part 1: Vocabulary Define the following terms: (from what you remember from middle school) Matter:…

A: Answer for part 1 Matter It is the substance of which any physical object consist. Atom It is the…

Q: 15. The elements sodium (Na) and chlorine (CI) are both deadly poisons. Salt (NaCl), which contains…

A: The given data is, the elements sodium and chlorine are both deadly poisonous. But the salt contains…

Q: Which of the following statements best describes the elements in Group 8A (18) of the periodic…

A: The elements in Group 8A (18) are : Helium (He), Neon (Ne), Argon (Ar), Krypton (Kr), Xenon (Xe) and…

Q: Sample of Substance X Change 1 Change 2 Change 3 Change 1 is: Change 2 is: Change 3 is: O impossible…

A: Physical change is defined as the one in which the form/state of the particle changes but their…

Q: Assume you have a pure sample of chemical element. Based on the characteristics below, what…

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Q: An element has the following natural abundances and isotopic masses: 78.99% abundance with 23.985…

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Q: What is a period in the periodic table? From what does it derive its name?

A: The elements are arranged in a periodic table. The properties of elements have been studied and…

Q: Which of the following statements is not true about the element potassium? Group of answer choices…

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

Q: 19. The graph above shows elements present in the greatest amounts in the human body. Use…

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

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Q: 15. The roots of the plants absorb the nutrients from the soil. For the farmers, it is important to…

A: Here we are required to find the best fertilizer which a farmer can used for the plants

Atomic Structure

The basic structure of an atom is defined as the component-level of atomic structure of an atom. Precisely speaking an atom consists of three major subatomic particles which are protons, neutrons, and electrons. Many theories have been stated for explaining the structure of an atom.

Shape of the D Orbital

Shapes of orbitals are an approximate representation of boundaries in space for finding electrons occupied in that respective orbital. D orbitals are known to have a clover leaf shape or dumbbell inside where electrons can be found.