Classify the following elements as metals, metalloids, or normetals S K N Si Det
ID: 937545 • Letter: C
Question
Classify the following elements as metals, metalloids, or normetals S K N Si Determine the followings for an atom whose complete symbol is 27 Al The total number of subatomic particles present in the atom The total number of subatomic particles present in the nucleus of the atom The total charge including sign associated with the nucleus of the atom Indicate number of protons, electrons & neutrons in each of the following atoms, ^13 Carbon ^63 Copper Indicate how many protons and electrons in each of the following ions? Na^+ , Atomic No 11, AL^3+ , atomic No 13 Calculate the molar mass of the following compound: C_6H_8O_6 Classify which of the following compounds would you predict to be soluble in at room temperature CaCO_3 KCIO3 NaOH Write the ion formed and name of the ionic compound Potassium and Chlorine Calcium & Oxygen Predict the type of bondings: SO_2 NA_2OExplanation / Answer
Ans- (1) ( a) 4 Fe + 3 O2 = 2 Fe2O3
(b) CH4 + 2 O2 = CO2 + 2 H2O
(2) (a) S = non metal , K = metal, N= nonmetal, Si = metalloid
(b) 13 Al27 = total no of subatomic particals present in atom (n,p- in nucleus, e- in orbitals)
(3) (a) 6C13 = ( e = 6, p = 6, n = 7) , 29Cu63= ( e = 29, p = 29, n = 34)
(b) Na+ = ( e = 10, p =11 ) , Al+3 = ( e = 10, p = 13)
(4) (a) molar mass of C6H8O6 = (12)*6 + (1)*8 + (16)*6 = 176
(b) CaCO3 more soluble at room temperature
(5) (a)potassium chloride = K+, Cl- = KCl , calcium oxide = Ca+2, O-2 = CaO
(b) Na2O-sodium oxide =ionic salt
SO2-Sulfur dioxide = covalent bond is present between each oxygen and the central sulfur atom, with two further electrons delocalised between the oxygens and the sulfur atom