Which elements and properties did Mendeleev examine when he predicted the properties of eka-aluminum and eka-silicon? Be specific and methodical. This will help you with completing this lab. -20-

Q: MCQ 40: The color of lodine (1) is A. grey B. black (s) C. purple (vapors) D. all of above

A: Iodine is element in the periodic table having elemental symbol I and atomic number 53 and belongs…

Q: 11 a) Element X and Y have 9 protons and 17 protons respectively. Based on your understanding,…

A: The number of protons present in an element correspond to the atomic number of an element. Atomic…

Q: An Element from Group 1A and Group 7A (Periods 2-6) shared a Chemical Bond which formed a solid…

A: Here is the answer

Q: moose te comect option the poduct series ofrex. edict nating em an (A)aui へ CULi Dean-Stark ANA 3)…

A: The question is based on the concept of organic reactions.   we have to identify the Product formed…

Q: 4. Using the Lewis structure of nitrogen as a model, please draw the Lewis structure for each of the…

A:

Q: Compounds that causes interference with the test of aluminum and zin ion * Your answer

A: The answer is as follows:

Q: State whether the following statements are true or false.          Briefly explain your answer.…

A: X-rays True- The closer the electron passes by the nucleus, the higher will be the energy of the…

Q: Which of the following are antimicrobial halogens?(a) Iodine (d) Iodophores (c) Bromine(d) Chlorine…

A: Halogens It consists of group 17 elements that are nonmetals. They form anions by accepting…

Q: Consider a green LED that draws 5 µW of power. Assuming all the power going into the LED is emitted…

A: Formula used Energy of n photon = nhc/wavlength(lambda) Where wavelength = 520nm c= 3×108 m/sec h =…

Q: Discuss the link between these underlying physical/chemical properties and the environmental or…

A: A question based on environmental chemistry that is to be accomplished.

Q: 23, and so on Which of the following was one of Empedocles elements (from ancient Greece)? Water O…

A: According to the greek philosopher , Empedocles , all matters was generally composed from four…

Q: You accidentally splash some sulfuric acid in your eyes. How would you handle this situation?

A:

Q: Mendelevium, atomic number 101, was synthesized in the year 1955 and commemorates Mendeleev's…

A: We are given some information of an element called mendelevium having atomic number 101.

Q: What chemical reaction happens when green dye changes to blue when expose to air?

A: when green dye changes to blue when expose to sir a chemical reaction happens that is redox…

Q: Eating of pechay and asparagus make your alimentary tract prone to gas formation. This is due to…

A: Gas in our stomach is primarily caused by swallowing air when you eat or drink. Most stomach gas is…

Q: 23. A chemist walks into his laboratory and finds that his assistant has reorganized his chemical…

A: The most reactive metals are those which can react very fast to form compounds. All group 1 elements…

Q: 3. Elements are arranged according to various trends, 5 in all, and reactivity. Use information from…

A: Reactivity of elements of periodic table is explained by valence electron,  alkali and alkaline…

Q: Which one of the orbital occupancy designation shown below does not make sense?    2s1 4f7 3d10…

A: The maximum number of electrons in any subshell is calculated with the formula: (4l+2) Where, l is…

Q: Based on the PBS program Fabric of the Cosmos: Quantum Leap, quantum mechanics provides the…

A: Based on PBS program fabric of the cosmos : Quantum leap, quantum mechanics provides the foundation…

Q: calculate the mass of the distillate_______________ and the density of the distillate.  use the…

A: Given,      Mass of the Empty graduate Cylinder = 5.280 grams      Mass of the Cylinder with…

Q: How the lead apron works against x-rays of a dental x-ray

A: Lead apron is a protective clothing that works as a radiation protector to shield people from…

Q: (11) (10) CHS Br (12) UV (11) - HNO, (13) (14) NO 59% 37% 46 (12) 第2頁,共2頁 891 個字 2中文(位司) é 9 95% FA-…

A:

Q: What is the chemical formula for Titanium (IV) Oxide? Show your steps.

A:

Q: Give 3 other applications of the Golden number found in Nature

A: Golden ratio, also known as the golden section, golden mean, or divine proportion, in mathematics,…

Q: 7. Proteins and carbohydrates consist primarily of carbon, hydrogen, and oxygen; these two molecules…

A: 1) Each atom has a nucleus made up of protons and neutrons.       2) In atoms, the number of protons…

Q: Which of these equations correctly represents the Haber process?

A: Given reactions

Q: Select all the elementary substances. cobalt (Co) phosphorus tribromide (PBR3) tungsten carbide (WC)…

A: An elementary substance contains atoms of a single type of element.

Q: 6. Explain the hazard identification system briefly.

A: Given question is asking about the hazard identification system, widely used in united states. In…

Q: 2. These images were taken here on Earth. What do you think caused these formations?

A: As here action of water is present ,so I'm taking this in chemistry subject.   Images taken by…

Q: 7. Assume that each of the following atoms reacts with ,hydrogen: (i) boron; (ii) silicon; (iii)…

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

Q: Which instrument can be used best to detect metals in Water like POTASSIUM?

A: potassium is very reactive element and it reacts even in water and air .

Q: Protons, neutrons, and electrons... Oh My! Chemistry seems to trouble the non-science major. Bottom…

A: Introduction :  Chemistry is the study of matter and the changes it can undergo, chemistry plays a…

Q: Henri Becquerel discovered that unstable atoms were giving off small particles/rays. What was coming…

A: Nuclear radiation The emission of elementary particles or energy resulting from the decay of atoms.…

Q: N2 + 3H2 → 2NH3

A:

Q: Can you help with 17 and I showed you an answer from the answer book. I think the legend of the…

A:

Q: Usage of synthetic colors has been restricted to a maximum limit of 199-200 ppm: a. True b. False…

A: Usage of synthetic colors has been restricted to a maximum limit of 199-200 ppm: a. True b. False…

Q: SO3 NO3 НРОА Mn04 Cd* Al*3 +2 Hg Pb** 21

A: names   SO3-2 NO3-1 HPO4-2 MnO4- Cd+2 Cadmium sulphite Cadmium nitrate Cadmium…

Q: The process of iron combining with oxygen to form rust is considered a chemical change because rust…

A: Rusting It is an oxidation reaction. The iron reacts with water and oxygen to form hydrated…

Q: 12. A student writes the following incorrect chemical equation for the synthesis of magnesium oxide.…

A: Solving only first question in accordance with guidelines.

Q: Rank the following ions according to their decrease in radius, showing the cause in detail:

A: Atomic size or atomic radius is the distance from the nucleus of the atom to its outermost shell.…

Q: BOW manvOLneoiowing willlomanatetite somion lW

A: Acidic solutions tells about those have higher concentration of hydrogen ions than water. Among NH 4…

Q: Meleulan foomule GeHigOg Smylet hapider

A: Organic NMR

Q: What is the reason why carbon is considered a unique element Carbon has two stable isotopes, carbon…

A: Reason why carbon is considered a unique element- Carbon is unique among all the elements because it…

Q: The atomic radius for radioactive radon (Rn) is Density for radioactive radon (Rn) is Boiling…

A: Radon is an element having atomic number 86. Its symbol is Rn.

Q: Below is a list of properties of elements. Classify them as a property of metals, nonmetals, or…

A: Given properties:

Q: what is the usage of hinsberg test in daily life?

A: For the Hinsberg test, benzenesulfonyl chloride is used as reagent, Hinsberg's reagent.

Q: Physical chemistry should be studied by students in chemical engineering because * It applies…

A: It deals with experimental observations.

Q: halogen noble gas

A:

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…