number 1 metal with 3 valence 1. Li electrons 2. Ba metal in the fifth period 3. Kr halogen 4. Br Alkaline earth metal 5. Mo noble gas 6. S 7. Al Nonmetal in the third period 8. C 8. C nonmetal with four valence electrons 9. H alkali metal

Q: why dose higher atomic weight elements in the firsts two groups in the periodic table  r(alkaline…

A: First and second group elements are alkali and alkaline earth metals (Alkali metals- Li,…

Q: Compared to their neutral atom counterparts, ions will have smaller or larger atomic radii due to…

A:

Q: Which of the following atoms are paramagnetic? Multiple answers: Multiple answers are accepted for…

A: Permagnetic Substance:-  These are the substance which containing unpaired electorns are known as…

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: 4. a. Calcium and oxygen react together to form calcium oxide. During the reaction two electrons…

A: For ca2+ arrangements of electrons 2,8,8

Q: Which Ion is expected to be the largest ? Ca2+ S2- K+ cl-  Or do  all of  these ions have the same…

A: All four ions have an equal number of electrons and therefore share the same electron configuration.…

Q: Part A:  How many Valence electrons are in Si?   1   2   3   4   5   6   7   8

A: Valence electrons means electron present in outermost orbital. Thus,

Q: 34. How many protons, electrons and net does Be have? beryllum 4 Ве 9.0122

A:

Q: Compounds of NH4*, the alkali metal cations, and Ca²+, Sr²+, and Ba²+ Compounds of NH4* and the…

A: Given combinations, NaI and KBrLi2CO3 and CsIKOH and Ba(NO3)2K2SO4 and CrCl3NiBr2 and AgNO3

Q: 69. What does the graph to the right best represent? a) atomic radii of Period 2 b) ionization…

A: Note: They all are very short questions so I am solving all questions. Given: Graph Rare earth…

Q: 7) As you move down a group (family) of elements, the number of valence electrons A) increases B)…

A: The answer to the following question is-

Q: 68. Which pair of elements do you expect to be most similar? Why?(a) Ti and Ga(b) N and O(c) Li and…

A: The elements belonging to the same group exhibit similar properties. This is because the elements in…

Q: The ionic radii of the ions S2–, Cl–, and K+ are 184, 181, 138 pm respectively. Explain why these…

A: The ions given are S2-, Cl- and K+. The number of electrons in all the species are same as the given…

Q: Arrange the atom and ions from largest to smallest radius. Largest radius Smallest radius Answer…

A: Given :- atom/ions = Cl+, Cl-, Cl  To arrange :- given atom/ions in decreasing order of their radius…

Q: Draw your own representation of the atomic model and describe the atomic structure using the four…

A: An atomic orbital is the wave function of an electron, probability of finding an electron. An…

Q: Some scientists think that life elsewhere in the universe might be based on the element silicon,…

A: The Lewis structure of an atom is the representation of the valence shell electrons of an atom. The…

Q: 2. Two possible models for arrangement of electrons in Li are shown below: electron "a" electron "b"…

A: The amount of energy required to remove an electron from an isolated gaseous atom is called the…

Q: Which of the following of Dalton’s proposals proved to be invalid? (a) Atoms are indestructible. (b)…

A: Dalton regarded the atom as hard and indivisible. Although Dalton's atomic theory provided a sound…

Q: For this question you must type in your answer canvas. When you type in your configuration make-…

A: Filling  of electrons in atomic orbitals follow certain rules. one of them is aufbau principle. it…

Q: Have you noticed the nutrient label in your favorite snack? What are the elements present in it?…

A: Element present in the snack are given on the back of the packet of snacks.

Q: What are valence electrons? A( Electrons on the outermost shell) B ( electrons on the first shell) C…

A: The total number of electrons present in an atom are distributed in the various shell. This…

Q: Which pair of elements have the same valence electronic configuration of np³? A) O and Se B) Ge and…

A: (A) 0 and Se belong to same group which is 16 valency electronic configuration for group 16 is np4.…

Q: Determine the number of electrons in Ag1+:

A: When the atom donates it's electron then it gets positive charge .

Q: Which pair of elements have the same number of valence electrons? O Do and Wh (elements 119 and 137…

A: Valence electrons :-  The electrons present in the outermost shell (valence shell) of an atom are…

Q: 1. Silicon has the electronic configuration 1s2 2s2 2p6 3s2 3p2.  Discuss how you can determine that…

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

Q: 2Mg (s ) + O (g ) 2MGO (s) Magnesium (Mg) reacts with oxygen gas (O) to produce magnesium oxide…

A: Given Reaction2 Mg (s) + O(g)  → 2 MgO(s)Correct movement of electron = To be determined

Q: 10. The atomic number of silicon is (a) 8 (b) 2 (c) 4 (d) 14 11. The atomic number of germanium is…

A: Since we only answer up to 3 sub-parts, we’ll answer the first 3. Please resubmit the question and…

Q: 1. Periodic table and electron configurationa) How many protons, electrons and Neutrons does the…

A: Hey, since there are multiple sub-parts posted, we will answer first three sub-parts. If you want…

Q: How many valence electrons does each of the following atoms have? titanium, ? = 22 iodine, ? = 53…

A: Electrons are filled in a different atomic orbital in an atom. According to the Aufbau rule, the…

Q: Q1 a) Write the electronic configuration of an ion formed by an element of group1A and period 6. (2…

A: [a.] An element of group 1A and period 6  = Cs ( Caesium) Ion formed by Cs = Cs+ (Caesium ion)  So,…

Q: Based on what you have just seen above, explain why the Alkali Metals are the MOST reactive metals…

A: The electrons are in the outermost shell of any element are known as valance electrons.

Q: Hydrogen bromide is a compound of the two elements hydrogen and bromine. It has a melting point of…

A: Since you have asked questions with multiple subparts, we will answer only first three subparts for…

Q: Br- Se2- Rb+ A and B B and C A and C A, B, and C

A: Correct option is all the above A,B,C. For negative charge we have to add an electron. For positive…

Q: Part 4: Making Connections to the Atom 1. Using Coulomb's law and the relative force of attraction…

A:

Q: How many valence electrons are in CH3CO? O A. 17 В. 24 O C. 20 O D. 18 Reset Selection

A: We have to count valence electron on each atom . first draw Lewis structure then we will count the…

Q: On the subject of the element Sulfur :    A)   How many valence electrons does Sulfur have?    B)…

A: The atomic number of sulfur element is 16

Q: The electron configuration for Potassium (K) is 1s? 2s? 2p® 3s² 3p® 4s'. How many valence electrons…

A:

Q: After studylng the chemical reactions of many compounds made of carbon, August discovers a chemical…

A: According to the question, we need to determine the missing words in the following phase.

Q: specific metal has an atomic weight of 95.94 g/mol, and atomic radius of 0.1363 nm . It has a BCC…

A: The density of the metal is given below

Q: Part A: Label the number of valence electrons each group on the periodic table has. Group 1…

A: Valence electron = Number of electron present in outer most shell

Q: What is the maximum number of electrons  that can be present in the principal level  which n = 3 ?…

A:

Q: 18 - for Cl, Cl + and Cl- ions; Cl- is the largest number of electrons II. Stripping electrons from…

A: The chlorine atom belongs to group 17 and its electronic configuration is 1s22s22p63s23p5. Cl is a…

Q: s4 2s2 2p4 3s 3p4 4s2 3d'o 4p4 5s2 4d'o 5p4 4fy 5d'o 6s2 Will it Likely: (+)Steal Electrons, ()Give…

A: In the periodic table s- block elements (metal) have tendency to give away electrons while p-block's…

Q: .List the following ions in order of increasing radius: Li+, Mg2+, Br–, Te2–.

A: Ionic size increases from top to bottom in a group due to the addition of extra shell for each…

Q: A. Which list includes species with the same number of electrons? c. K', CI, s² d. Fe 2, Co?, Ni ?…

A: Isoelectronic species: For positive charge we have to remove an electron and for negative charge we…

Q: Cations (5 items) (Drag and drop into the appropriate area) ✔ In = Rb Sb Items in order 1 Sn Largest…

A: Given atoms of STRONTIUM(Sr),INDIUM(In),RUBIDIUM(Rb) and ANTIMONY(Sb). We need to arrange them in…

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: Predict the electron configuration for the Sb atom:     Predict the electron configuration for the…

A: Since we know that the electron configuration of an element describes how electrons are distributed…