exam

1- A sample of nitrogen gas has a volume of 32.4 L at 20°C. The gas is heated to 220ºC at constant pressure. What is the final volume of nitrogen? 

2- At what temperature will a fixed amount of gas with a volume of 175 L at 15°C and 760 mmHg occupy a volume of 198 L at a pressure of 640 mm Hg? 

3- Calculate the density, in g/L, of chlorine (Cl2) gas at STP. 

4-What is the molar mass of Freon-11 gas if its density is 6.13 g/L at STP? 

5- The second line of the Balmer series occurs at a wavelength of         486.1 nm. What is the energy difference between the initial and         final levels of the hydrogen atom in this emission process? 

6- What is the maximum number of electrons in a atom that can have     the following set of quantum numbers?
        n = 2        l = 0           ms = -1/2  

7- What is the maximum number of electrons in a atom that can have      the following set of quantum numbers?
        n = 4        l = 3        ml = -2        ms = +1/2  

8- A possible set of quantum numbers for the last electron added to       complete an atom of gallium in its ground state is

9- Which of the following species has the most unpaired electrons?

     S+, S or S- .

10- What is the possible set of quantum numbers for the last electron       added to complete an atom of Rhodium in its ground state.

11- Which ground-state atom has an electron configuration described        by the following orbital diagram?

12- Write down the electron configuration for Mo? 

13- The following ground state electron configuration is incorrect,           explain what mistake has been made

1s22s22p43s2

14- Write down the general electron configuration for atoms of all            elements in Group 4A .

15- Write down the general electron configuration for atoms of all           elements of the first row transition elements.

16- An element with the general electron configuration for its                   outermost electrons of ns2np5 would be in which element group?

17- In what group of the periodic table is the element with the                 electron configuration [Ar]4s23d104p3? 

18- Write down the electron configuration for the a Indium ion? 

19- Write down the electron configuration for the a phosphide ion?

20- Write down the electron configuration of a nickel(III) ion

21- Which element that makes a divalent Cation that is isoelectronic         to the noble gas Kr

22- Which element that makes a divalent Anion that is isoelectronic         to the noble gas Xe

23- Why is the Mg2+ ion smaller than F- even though they are                  isoelectronic?

24- Which species has the greater radius, an I- ion or an I atom?                Briefly explain your choice of answer.

25- How do sodium metal and sodium ions differ in their chemical           properties? 

26- Arrange the elements in each of the following in order of                   increasing electron affinity: O, Si, P, Ca, Ba.

27- Arrange the elements in each of the following in order of                   increasing ionization energy: Na, Cl, Al, S, Ca.