Chapter 2- Tutorial Dr. Nouf Alotaibi

Rutherford's experiment with alpha particle scattering by gold foil established that: Electrons have negative charges. Protons are not evenly distributed throughout an atom. Atoms are composed of protons, neutrons, and electrons. Protons are located in the nucleus of an atom. Two isotopes of an element differ in their: Atomic masses Atomic numbers Numbers of protons Numbers of electrons

How many protons, neutrons, and electrons are there in an atom of chlorine-39? Cl From period table- find electron no.= proton no. 39 Cl 17

From periodic table Z= 20 A=40 20 protons 20-2=18 electron How many protons and electrons are present in a Ca2+ ion? 20 protons and 18 electrons 18 protons and 20 electrons 20 protons and 21 electrons 20 protons and 19 electrons From periodic table Z= 20 A=40 20 protons 20-2=18 electron 40-20=20 neutron

How many protons, neutrons and electrons are there in the anion  31P3–? A. 15 protons, 16 neutrons, 12 electrons B. 16 protons, 15 neutrons, 18 electrons C. 15 protons, 16 neutrons, 18 electrons D. 12 protons, 19 neutrons, 15 electrons From periodic table Z= 15 A=31 15 protons 15+3=18 electron 31-15=16 neutron

What is the correct empirical formula ratio for hydrazine (N2H4)? B) 1:1 C) 2:2 D) 2:4 Molecular formula imperical formula N2H4 N1H2

Co is a transition metal Cox+ Cl- X + -1*3=0 X=+3 Co3+ What is the formula for the ionic compound formed by calcium ions and phosphate ions? CaPO4 Ca2(PO4)2 Ca3PO4 Ca3(PO4)2 The correct Stock system name for CoCl3 is: Cobalt trichloride Cobalt(III) chloride Cobalt(III) trichloride Cobalt chloride Ca from group 2 Ca2+ PO43- Ca☐(PO4)☐ Ca3(PO4)2 Co is a transition metal Cox+ Cl- X + -1*3=0 X=+3 Co3+

Cu is a transition metal Cux+ SO42- X + -2*1=0 X=+2 Cu2+ The correct name of (NH4)2SO3 is: Ammonia sulfite Ammonium sulfate Ammonia sulfate Ammonium sulfite The correct Stock system name for CuSO4. 5 H2O is: Copper(II) sulfate pentahydrate Copper(II) sulfate hydrate Copper(I) sulfate pentahydrate Copper sulfate pentahydrate Cu is a transition metal Cux+ SO42- X + -2*1=0 X=+2 Cu2+

The correct name of N2O4 is:  dinitride pentoxide Dinitrogen tetroxide Nitro-oxalic acid dinitrogen monoxide The correct name of H2SO4 is:  Dihydrogen sulfur tetroxide hydrosulfuric acid Sulfurous acid Sulfuric acid

The correct name of CCl4 is: Monocarbon tetrachloride monocarbon tetrachlorine Carbon tetrachloride carbide pentachlorine The correct name of SO3 is: sulfate Sulfur trioxide Sulfite sulfuric acid

What is the formulas for the following chemical compounds: silicon dioxide nickel (III) sulfide potassium carbonate ammonium oxide SiO2 Ni2S3 K2CO3 (NH4)2O

Which of the following represents the correct name of H2SO4? Sulfurous acid Sulfuric acid Hydro sulfuric acid Hydro sulfurous acid Which of the following is the correct name of H2SO3? Sulfuric acid Hydro sulfurous acid Sulfurous acid Hydro sulfuric acid

In which of the following are the formulas of oxyacids correctly matched with their name? H2SO4 – Sulfurous acid HNO2 – Nitric acid HNO3 – Nitrous acid HClO2 – Chlorous acid Which of the following is the correct name of HNO2? Hydro nitrous acid Hydro nitric acid Nitric acid Nitrous acid

NaClO is named: sodium chlorite sodium chlorate sodium hypochlorite sodium hypochlorate