GT CHEMISTRY

Unit: Atomic Theory

Name: ______Date: ______MOD: ______

Atoms vs. Ions

Use the chart below the answer the following questions:

Atom / No. Electrons / Subshell Electron Configuration / Ion / No. Electrons / Subshell Electron Configuration
H / 1 / 1s1 / H- / 1 + 1 = 2 / 1s2
He / 2 / 1s2
Li / 3 / 1s22s1 / Li+ / 3 - 1 = 2 / 1s2
Be / 4 / 1s22s2 / Be2+ / 4 - 2 = 2 / 1s2
B / 5 / 1s22s22p1 / B3+ / 5 - 3 = 2 / 1s2
N / 7 / 1s22s22p3 / N3- / 7 + 3 = 10 / 1s22s22p6
O / 8 / 1s22s22p4 / O2- / 8 + 2 = 10 / 1s22s22p6
F / 9 / 1s22s22p5 / F- / 9 + 1 = 10 / 1s22s22p6
Ne / 10 / 1s22s22p6
Na / 11 / 1s22s22p63s1 / Na+ / 11 - 1 = 10 / 1s22s22p6
Mg / 12 / 1s22s22p63s2 / Mg2+ / 12 - 2 = 10 / 1s22s22p6
Al / 13 / 1s22s22p63s23p1 / Al3+ / 13 - 3 = 10 / 1s22s22p6
P / 15 / 1s22s22p63s23p3 / P3- / 15 + 3 = 18 / 1s22s22p63s23p6
S / 16 / 1s22s22p63s23p4 / S2- / 16 + 2 = 18 / 1s22s22p63s23p6
Cl / 17 / 1s22s22p63s23p5 / Cl- / 17 + 1 = 18 / 1s22s22p63s23p6
Ar / 18 / 1s22s22p63s23p6

1.  Organize the atoms into three groups based on the common ion they form.

2.  Examine the electron configurations of the ions formed for hydrogen, and lithium-boron. These atoms lost electrons to obtain an electron configuration like which element? ______

3.  Examine the electron configurations of the ions formed for nitrogen to fluorine. These atoms gained electrons to obtain an electron configuration like which element? ______

4.  Examine the electron configurations of sodium to chlorine. These ions all have electron configurations that end in what two things (a letter and number)?

______

5.  Why would atoms form ions? ______

______

6.  Why are there no ions listed for Helium, Neon, and Argon? ______

______