What property did Mendeleev have that allowed him to put the elements in a pretty good order from lowest to highest and what was the first element where we found a problem with the patterns and had to switch them around a bit? What is a periodic property? Describe and give an example.

Q: How many elements are in the 6th period of the periodic table?

A: Periods are the horizontal rows in the periodic table.

Q: which of the following statements is not part of Dalton's original atomic theory?  all atoms of one…

A: According to Dalton's atomic theory, Atoms are indivisible. i.e. there is no subatomic particles…

Q: An element "X" is an alkaline earth metal and reacts with element "Y" which is a halogen. What is…

A: The ionic compound formed when alkaline earth metal reacts with halogen given below.

Q: According to Coulomb’s law, what happens to the potential energy of two oppositely charged particles…

A: What happens to the potential energy of two oppositely charged particles as they get closer…

Q: The element in period 3, group 2: _________________ The element in period 5, group 13:…

A: The correct assignment of the desired elements and their catagory can be done based on their…

Q: What is the chemical symbol of the element found in the 4th family and 5th period of the periodic…

A: Carbon family is called 4th family and there elements are C , Si , Ge , Sn , Pb , Fl

Q: Imagine that you have been transported to an alternate universe where all the elements are different…

A: The atoms are arranged in a systematic manner on the basis of their atomic number in a periodic…

Q: If F is a reactive nonmetal, which other element or elements shown hereare likely to be reactive…

A: Concept introduction: Modern periodic table can be classified on the basis of the atomic number of…

Q: What are the main features of Mendeleev's periodic table?

A: Mendeleev states that the “the properties of the elements are the periodic function to their atomic…

Q: Identify 4 patterns and trends in the way the elements are arranged on the periodic table?

A: Patterns and trends in the properties of chemical elements that are revealed in the periodic table…

Q: 7) To elements in the gas state react to form a new compound. Based on the state of matter of the…

A: Reactions in which two or more chemical species combine to form an entirely different species is…

Q: 66. Which element do you expect to be most like magnesium? Why?(a) potassium(b) silver(c) bromine(d)…

A: Magnesium = Its atomic number is 12, and present in Group 2 in the periodic table.

Q: Write the balanced chemical equation for the reaction of solid potassium with liquid water?

A: Given: Reaction of solid potassium with liquid water.

Q: Mendeleev's Periodic Table vs. the Modern Periodic Table Mendeleev's Periodic Similarities Modern…

A: Mendeleev's periodic table and Modern periodic table helps us to predict position of an element and…

Q: ou as teacher would like to revise the periodic table in a creative way with your learners in Grade…

A: The periodic  table is also known as the periodic table of elements and it is the tabular display of…

Q: Mendeleev arranged the elements according to atomic weight and chemical reactivity. atomic number…

A: Mendleev arrange element according to increse order of atomic weight and chemical reactivity of…

Q: Determine whether each element is a main-group element.a. tellurium b. potassiumc. vanadium d.…

A: Main group elements are the elements of s and p block. In s-block , group 1 and group 2 are present.

Q: Which element has a chemical properties that are most similar to potassium? Cesium Sulfur Nitrogen…

A: The vertical column of the elements which are present in the periodic table is known as groups. Each…

Q: Examine Figure 5.1 and determine the name of the element that Mendeleev predicted before its…

A: In Mendeleev's periodic table elements are arranged according to their increasing atomic…

Q: The periodic table is a result of the periodic law. What observations led to the periodic law? What…

A: Given information,       The periodic table is a result of the periodic law.

Q: In general, atomic masses increase as you move across a row or down a column. This was one of the…

A: Given: Mendeleev periodic table To find: The two elements were placed in order that contradict…

Q: Part B Mendeleev placed thallium (TI) in the same group as lithium (Li), sodium (Na), potassium (K),…

A:

Q: Four elements are named for planets in our solar system (including the ex-planet Pluto). Give their…

A: Since you have posted multiple questions, we are entitled to answer the first 3 only.

Q: In Groups 1A-7A, name all elements in each group that has the smallest atomic radius?

A: Atomic radius of an atom is dependent upon the following factors: Effective nuclear charge…

Q: Many of the CHEMICAL PROPERTIES of the elements vary periodically with the atomic numbers. The best…

A: Periodic table follows the periodic law,  thats chemical and physical properties of the elements are…

Q: Which of the following is the most important factor in determining the chemical properties of an…

A: Atoms consists of protons, electrons and neutrons

Q: 7.) Identify the following elements: a. period 5 alkali metal. 5 halogen. b. period 4 halogen. C.…

A:

Q: Describe Thomson’s model of the atom. How might itaccount for the production of cathode rays?

A: The atomic model proposed by Thomson was the plum-pudding model. According to Thomson's atomic…

Q: What is used as basis for the better arrangement of elements in the periodic table and the key to…

A: Basis for the better arrangement of elements in the periodic table and the key to the discovery of…

Q: Detine moderm periodic Law, Discus the construction of the long form of the | periodic table.

A: “The physical and chemical properties of the elements are periodic functions of their atomic…

Q: Identify the element that fits each description. An alkali metal in period 6 a main group element in…

A: Given :-  An alkali metal in period 6 a main group element in period 3, group 7 A main group…

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

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

Q: Which of the following statements concerning the periodic table is incorrect?   a. All the elements…

A:

Q: A student is asked to identify an element that is highly reactive, solid, and conducts electricity…

A: Highly reactive , solid and conductor of electricity , element present at location 1.  It is…

Q: Describe the contribution of the following scientist in the development of the periodic table -John…

A:

Q: Which of the following statements is correct about the periodic law? *       A. Properties of…

A: Which of the following statements is correct about the periodic law?

Q: look up dmitri mendeleev and find out how he constructed the original periodic table. present at…

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Q: Which pair of elements do you expect to be the most similar? a. Molybdenum and Tin b. Nitrogen and…

A: Given,  a. Molybdenum and Tin  Electronic configuration of Mo = [Kr]4d55s1  Electronic configuration…

Q: 8) A chemistry student reacts a black metallic element with an element that exists as a bright blue…

A: Hey, since there are multiple questions posted, we will answer one question. If you want answer for…

Q: Which of the following elements would you expect to have similar properties? As Te Ar Sn He

A: The element present in the same group of the periodic table has the same chemical properties. The…

Q: Introduction of the periodic table: Give a timeline outlining who contributed to the discovery of…

A:

Q: Evaluate how the elements in period 4 to show how the physical state changes as the atomic number…

A:

Q: When elements are arranged by increasing atomic number, and by periods according to their…

A: According to the given question we have, as we move across the period the atomic number increases.…

Q: Look up the density of silicon and of lead in a table online. Then look up the atomic radius of…

A: The densities of atoms depends on the number of protons in the nucleus. The number of protons is…

Q: 92. The three most stable oxides of carbon are carbon monox- ide (CO), carbon dioxide (CO.), and…

A: Given the three oxides of carbon are as follows: CO CO2 C3O2

Q: What characteristics of Boron are similar to Group 14 elements

A: Boron is belongs to group 13th . The outer most electronic configuration of boron family is ns2np1.…

Q: Suppose that you face a problem similar to Mendelev: You must predict the properties of an element…

A: In the periodic table, the elements are arranged in order of their increasing atomic numbers. The…