1. Write electron configuration of Y2+ by filling number of electrons in each orbital.  Write orbital symbol first, followed by number of electrons in [  ] (e.g., electron configuration for O would be 1s[2]2s[2]2p[4]).  Condensed form of electron configuration is accepted. 2. How many unpaired electrons does Y2+ have ? (must have correct electron configuration above to get credit)

1. Write electron configuration of Te (tellurium) atom by filling number of electrons in each orbital.  Write orbital symbol first, followed by number of electrons in [  ] (e.g., electron configuration for O would be 1s[2]2s[2]2p[4]).  Condensed form of electron configuration is accepted. 2. How many unpaired electrons does Te atom have ? (must have correct electron configuration above to get credit)

The systematic name for the compound K2SO4 is  

How many hydrogen atoms are there in 10 molecules of H2O?

1) What’s the systemic name of NF3? 2) Write the correct formula of rhenium(IV) phosphide. 3) What’s the systemic name of HF(aq)?

1. Write electron configuration of I (iodine) atom by filling number of electrons in each orbital.  Write orbital symbol first, followed by number of electrons in [  ] (e.g., electron configuration for O would be 1s[2]2s[2]2p[4]).  Condensed form of electron configuration is accepted. 2. How many unpaired electrons does I atom have ? (must have correct electron configuration above to get credit)

The electronic configuration for Br is 1s22s22p63s23p14s23d104p5. The valence configuration for Br is  

What’s the empirical formula for N2O5?

What’s the empirical formula for P4O10?

The electronic structure of the potassium atom is [Ar]4s1. The electronic structure of the potassium cation is