Choose one or more: A. Iron is the heaviest element on the periodic table. O B. Iron is electrically conductive. C. Iron is ferromagnetic. D. Fusing iron in the core would absorb energy rather than release it. O E. Iron causes the core to collapse. O O O O O

Q: How much energy is required to raise the temperature of 14.6 grams of gaseous krypton from 21.8 °C…

A:

Q: Consider the table. ITITE Metal Tm (K) AHfus (kJ/mol) Tp (K) AHvap (kJ/mol) Li 454 2.99 1615 134.7…

A: We have given that For K ∆Hfus = 2.33 kJ/mole = 2330 J/mole                       Tm = 336 K   ∆Hvap…

Q: Hydrazine, N2H4, can be used as fuel to orient and maneuver spacecraft. The energy used to do so is…

A: (A) Writing down the balanced chemical equation: N2O4(l) + 2 N2H4(aq) ----> 3 N2(g) + 4 H2O(l)…

Q: Which of the following would have the largest radius? a. O2- b. Mg2+ c. F- d. B3+

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Q: 8. Most elements on the periodic table at 25°C and 1 atm are (choose all that apply) a. conductors…

A: All the chemical elements of the periodic table can be broadly divided into three categories,…

Q: . A hydrogen ion (H+) has neutron(s), proton(s), andelectron(s).a. 1; 0; 2 b. 0; 1; 0 c. 0; 0; 1 d.…

A: Neutron, proton, and electron are fundamental subatomic particles.  The number of protons is equal…

Q: 13. Copper atoms and zinc atoms have the same atomic radius, 135 pm. Based on this information,…

A: Atomic radius is defined as the total distance present from the nucleus of an atom to the outermost…

Q: Question 5 This equation represents the formation of a typical ion from which group of the Periodic…

A: The equation given is  M: →M2+ + 2 e–

Q: Shade four elements in the outline Periodic Table below. 1. The last element in the first transition…

A: A periodic table is an arrangement of atoms in the increasing order of their atomic number. The…

Q: Which of the following set of elements contain only type II metals? O Na, Ca, Mg O Mn, Cd, Co O Ni,…

A:

Q: Part 2: Color land labell each section of the Representative Elements a unique shade. Color the…

A: Representative elements are main group elements. They are s-block and p-block elements. There are…

Q: Which elements and properties did Mendeleev examine when he predicted the properties of eka-aluminum…

A: In Mendeleev’s periodic table elements are arranged in the increasing order of their atomic mass.…

Q: Here is a balanced reaction: 14 H+ (aq) + Cr2O7 2- (aq) + 6 Cl- (aq) ➔ 2 Cr3+(aq) + 7 H2O (l) + 3…

A: Here is a balanced reaction:14 H+ (aq) + Cr2O7 2- (aq) + 6 Cl- (aq) ➔ 2 Cr3+(aq) + 7 H2O (l) + 3 Cl2…

Q: 36. The elements in period 2 with the greatest stability are A) boron and carbon B) carbon and…

A: Given are a pair of period 2 elements.To find the pair which is more stable.

Q: 2. In a Mars Direct mission, the astronauts would return home in an Earth Return Vehicle (ERV)…

A:

Q: What can happen as nuclei decay? A.The atom will donate protons and neutrons to another…

A: Nuclear decay is the process in which unstable nuclei is converted into stable nuclei by releasing…

Q: Shade four elements in the outline Periodic Table below. 1. A transuranic element. 2. The last…

A: Transuranic elements:- The elements of actinoid series having the atomic number greater than 92.…

Q: Would you agree to buy 1.23 x 1021 platinum atoms for $21? Explain why or why not, showing all work.…

A: 1 mole = 6.022×1023 [ Avogadro's number ] The mass of 1 mole of atoms of an element is called its…

Q: Magnesium has 12 protons. How many electrons are in its second energy level? O 1. two O 2. four 3.…

A: Different energy levels in the atom correspond to the different principal quantum number values (n)…

Q: There are 17 Rare Earth Elements. Pick any 5 of them, and for EACH of the 5, explain in detail why…

A: Rare earth elements are a group of seventeen chemical elements that occur together in the periodic…

Q: Of the following substances, which one contains the highest density of free electrons? a. hard…

A: Answer:Higher the number of free electrons in a substances, better conductor of heat and electricity…

Q: The valence shell electron configuration of this group of elements is extremely stable, so stable in…

A: The configuration of group VIII- A elements is ns2 np6. These are called noble gases. These elements…

Q: What is the chemical formula for the compound formed between chromium(VI) and chlorine? chemical…

A: -> Ionic compounds are composed of a positive ion and a negative ion bonded together in a…

Q: How many hydrogen atoms are connected to the indicated carbon atom? a. one b. two c. three d. four…

A:

Q: The characteristics of two different types of reactions are shown below: Reaction A: Protons are…

A: ii) Valence electrons are involved in Reaction B but not in Reaction A. True

Q: The Group on the Periodic Table that BEST demonstrates the concept that elements in the same Group…

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

Q: What is the best description of bond length? a. a distance between nuclei that yields the best…

A: Bondlength is the distance between  nuclei of two atoms. It is generally in the order of picometer…

Q: Which of the following is NOT a property of phosphorus?

A: Phosphorous (P) resides in group - 15 and 3rd period of the periodic table. P belongs to the…

Q: 5. A student tests an unknown substance that she believes to be a metal. Which of the following…

A: Metals are usually crystalline solids. In most cases, they have a relatively simple crystal…