1. Electronegativity : Tendency to attract electrons towards itself.
From periodic Table, As we move from left to right, electronegativity of element increases as size decreases. Thus, Most electronegative element is Cl
2. Hydroxide ion is : OH-. Thus, having -1 charge
Thus, answer is: NO3-
3. Valence shell electronic configuration of
Cl = 3s23p5 = 7 electrons
Si = 3s23p2 = 4 electrons
S = 3s23p4 = 6 electrons
P = 3s23p3 = 5 electrons
Answer is S
4. Sulfate ion is SO42-
5. Elements having electronegativity difference more than 1.7 are ionic. Most of them are compounds consisting of metals and non- metals.
GaAs :Covalent
SrBr2 : Ionic ( metals and non-metals)
CBr4 : Covalent
NO2 : Covalent
which atom is most electronegative - P -Cs -Cl -Li Which of the following anions same...
25-30 25. Which of the atoms listed below is the most electronegative? A) Li B) Cs C)P D) As E) Ge 26. The number of pi bonds in the molecule below is ?? ?? A) 2. B) 4. C) 6. D) 10. E) 15 27 Which of the following molecules have the same geometries? 28. Which of the following is a basic oxide? 29. Which of the following elements behaves chemically similarly to oxygen? 30 Lanthanide (or rare earth elements)...
1. Known solution of anions. What did you see? (Observation) Which compound caused this? (Conclusion) 1a. Cl test. Net ionic equat. 2- 1b. SO4 test Net ionic equat. T 1c. NO3 test Net ionic equat. 2- 1d. CO3 test Net ionic equat.
Consider the following elements: Si, Co, Cl, P, Sr, F, Rb. Select the most accurate statement. - Co, Sr, and Rb will form ionic compounds with Cl and F. - Sr and Si will form ionic compounds with Co. - Rb, Sr, and Co will form ions of +1 charge. - Rb, S,r and Co will form ions of +2 charge. - Al, Si, P, and Cl will form stable anions.
Soluble Ions 1. Cations 2. Anions Empirical Solubility Rules The presence of these ions tend to make the ionic compound water soluble (note exceptions). Ions Exceptions (compounds are insoluble despite having these cations) Li", Na, K, Exceptions = Li,Co, and LigPO4 NH Exceptions (compounds are insoluble Ious despite having these anions) NO,, nitrate ion No exceptions, all nitrates are water soluble C₂H₂O₂: No exceptions, all acetates are water soluble No acetate ion CIO4, CIO3. No exceptions, all perchlorate and chlorate...
19) How many of each type of atom are there in the formula Ca3(PO4)2? A) Ca = 3, P = 1,0 = 4 B) Ca 3, P = 2, O = 4 C) Ca = 3, P = 2,0=8 D) Ca = 3, P = 1,0 = 8 E) none of the above le Ol be 20) What is the correct formula of a compound that has ten oxygen atoms and four phosphorus atoms? A) O10P4 B) 100P4 C) 4P010...
COnsider the following elements; Li Al Mg I S N a) Most Metallic? b) Least Metallic? C) Lowest Electronegativity? d) Highest ionization energy? e) Largest atomic radius? f) Which are non-metals? g) Which are conductors? h) Highest electron affinity? I) List them in order from small atomic to large size. J) Would gain two electrons to form ion? K) Would iodide ion considered to be cations or anions? L) Would lithium ion be larger or smaller than lithium atom? M)...
1) When comparing the size of ions to the neutral atom from which they are formed, which of the following is true? A) cations are larger than the neutral atom; anions are larger than the neutral atom B) cations are smaller than the neutral atom; anions are smaller than the neutral atom C) cations are larger than the neutral atom; anions are smaller than the neutral atom D) cations are smaller than the neutral atom; anions are larger than the...
Rank the following elements in order of increasing metallic character (from least metallic to most metallic): Ne, K, Mg, Rb, N 2. Which of the following groups of elements all have 7 valence electrons? Select one: Li / Na / K / Rb N / P / As / Sb C / Si / Ge / Sn F / Cl / Br / I B / Al / Ga / In O / S / Se / Te
is incorreer? all s area eleseis erand e are metals b, all p area elements are nonmetals 29) Which of the following statements concerning metals and all d area elements are d. all farea elements are metals 3o) Which of the following electron configurations corresponds to an el periodie table as the element whose electron configuration 112 a. 1s32s 2p 3D How many valence electrons are present in an atom of vanadium? PLACE ANSWER HERE 32) Define the octet rule....
Which of the following elements most likely has the same number of valence electrons as silicon (Si)? arsenic (As) O sulfur (s) O germanium (Ge) O phosphorus (P)