est Review Active J is how manganese appears in the periodic table. 25 Mn+ Manganese 54.94 1 rk this and return 2 3 4 Save and Exit 5 6 What is the arrow is pointing to? O period symbol of manganese isotope symbol of manganese group symbol of manganese chemical symbol of manganese 7 Next 8 9 Subn

Q: Decide which element probably forms a compound with oxygen that has a chemical formula most and…

A: The compound formed by oxygen and lithium is lithium oxide (Li2O). 4Li  +  O2  →  2Li2O

Q: periodic

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Q: an imaginary element (x) on mars is composed of 2 isotopes 34.14% of isotope x34 with a mass of 34.0…

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Q: Naturally Occurring Isotopes of Copper Atomic Mass Isotope (atomic mass units, u) 62.93 64.93 Cu-63…

A: Cu - 63 atomic mass = 62.93 amu Abundance = 69.17% Cu - 65 atomic mass = 64.93 amu Abundance = 30.83…

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Q: Determine the number of neutrons, protons, and electrons for a bromide ion that has a mass number of…

A: Atomic symbol of bromide ion = Br- Mass number = 78  Number of(protons + neutrons)= mass  Atomic…

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Q: Question 29 What ionic charge would you think most likely for the element Se? (You may want to refer…

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Q: Help

A: The correct option is  c. React in similar ways

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A: Protons, which have a positive charge, neutrons, which have no charge, and electrons, which have a…

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Q: 81 protons and 78 electrons Express your answer as an ion.

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Q: 13. (Entropy) For each of the following processes, tell whether the entropy of the universe…

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Q: Use a periodic table to complete the following. submitted Name mercury scandium carbon Elements…

A: Atomic number is the number of protons present in an element.

Q: An ion has a +3 charge when it has 28 electrons. Which element is it? Show your reasoning.

A: An ion has a +3 charge when it has 28 electrons meaning that its elemental atom must have 31…

Q: USE EVIDENCE and as many Word Wall words as you can to explain WHAT IS INCORRECT ABOUT THE BOHR…

A: The concept used in this question is from basic Chemistry.  According to Bohr Model  Electrons are…

Q: For the following element fill in the blanks with the appropriate numerical or word answer. Make…

A: Strontium is in the 5th period of the periodic table. The period number of an element signifies the…

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A: We are familiar with periodic table. For reference I'm attaching a periodic table from internet  We…

Q: O Macmillan Learning Identify the missing information for each neutral isotope. A Se atom has a mass…

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Q: 200 What conclusions can you draw from this graph? 180 Atomic radius 160 140 120 100 Na Mg Al Si P…

A: Since you have asked have multiple questions, we will answer only first question for you. In order…

Q: Write isotopic notation symbols for each of the following   z=8.  A=18

A: Isotope notation:

Q: 57 58 La Ce Lanthanum 138.90047 Cerlum 140.11 Ptable 90 89 Ac Actinium (227) .com Th Therum 21203M…

A: Atomic mass of Pd is 106.42u and atomic mass of Cd is 112.411u  Ag has atomic mass of 107.86 u…

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Q: QUESTION 12 Which of the following statement is/are False O As you move down a group: Atoms…

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Q: As a result of Aston's work, we know that two nuclei are isotopes when they have the same atomic…

A: Isotopes are the nuclei which differs in the number of neutrons in them.

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A: The electron dot structure or Lewis structure represents the bonding in a compound in terms of its…

Q: The element which has four valence electrons is ________.( A) H B) Na C) Mg D) Si E) S

A: A valence electron is an outer shell electron that is associated with an atom, and that can…