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How does the rate of reaction change if a first order reactant's concentration increases?
 Increases by the same factor eg.
 Increases by 2 : Rate increases by 2^{1 }^{}

How does the rate of reaction change if a second order reactants's concentration changes?
 Increases by that factor to the power 2
 eg.
 Increases by 2 : Rate increases by 2^{2 }= 4
 Increases by 0.5 : Rate increases by 0.5^{2 }= 0.25

Which empties first: 4s or 3d electrons ?
4s!!

What is the electron configuration of Scandium?
1s^{2} 2s^{2 }2p^{6 }3s^{2 }3p^{6} 4s^{2} 3d^{1}

What is the electron configuration of Titanium?
1s^{2} 2s^{2} 2p^{6} 3s^{2} 3p^{6 }4s^{2 }3d^{2}

What is the electron configuration of Vanadium?
1s2 2s2 2p6 3s2 3p6 4s^{2 }3d^{5}

What is the electron configuration of Chromium?
 1s2 2s2 2p6 3s2 3p6 4s^{1 }3d^{5}
 ^{}
 Chromium has one electron in each orbital of the 3d subshell rather than 2 in the 4s subshell.
 This gives it more stability.

What is the electron configuration of Manganese?
1s2 2s2 2p6 3s2 3p6 4s^{2} 3d^{5 }

What is the electron configuration of Iron?
1s2 2s2 2p6 3s2 3p6 4s^{2} 3d^{6 }

What is the electron configuration of Cobalt?
1s2 2s2 2p6 3s2 3p6 4s^{2 }3d^{7}

What is the electron configuration of Nickel?
 1s^{2} 2s^{2} 2p^{6} 3s^{2} 3p^{6} 4s^{2 }3d^{8}^{}

What is the electron configuration of Copper?
1s^{2 }2s^{2 }2p^{6} 3s^{2} 3p^{6 }4s^{1 }3d^{10}

What is the electron configuration of Zinc?
1s^{2 }2s^{2 }2p^{6} 3s^{2} 3p^{6 }4s^{2} 3d^{10}