SAT Subject Test Chemistry,10 edition

TEST STRATEGY

On  classification  questions,  don’t   eliminate   an  answer  choice  just    because you’ve  used    it.

Answer  choices can be  used    more    than    once    (or not at  all).

Ionization potential is a measure of the energy required to form a cation from the ground state.
Electron affinity is the measure of the energy released when the atom accepts an electron to form
an anion. The standard electrode potential is defined to be zero volts for the standard hydrogen
electrode in which H+ is reduced to H 2 gas. The atomic radius is determined by the principal
quantum number of the valence shell and the interaction of the positive nucleus and the negative
electrons. Larger atoms have electrons in higher level shells (larger principal quantum number) and
atoms with more positive charge in the nucleus attract valence electrons more strongly and thus
draw them in tighter, decreasing radius. In light of this, the correct answers for this question set are
1.(C); 2.(B); 3.(D); 4.(E).

(A) Electronegativity

(B) Electron    affinity

(C) Ionization  potential

(D) Standard    electrode   potential

(E) Atomic  radius

1. Measures an  energy  consuming   process

2. Measures an  energy  releasing   process

3. Measured against the hydrogen    half    cell    reaction

4. Decreases    as  you travel  right   and up  the periodic    chart