Aleks Placement Test Chemistry Questions and Answers.

Aleks Placement Test: Chemistry Questions
and Answers
Question 1
Compound
Correct Answer
Two or more elements that are chemically bonded; includes ionic and covalent



Question 2
F, O, N
Correct Answer
what must hydrogen be bonded to to be considered hydrogen bonding?



Question 3
Activation Energy Graph
Correct Answer
download
from reactants to loop

other is either energy absorbed or released



Question 4
Lead
Correct Answer
Pb(2+) & Pb(4+)




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,Question 5
Atomic Radius
Correct Answer
The radius of an atom; decreases as you move left to right and increases as you
move top to bottom



Question 6
John Dalton
Correct Answer
Used and combined previous ideas to discuss the atom; elements are made of
atoms; all atoms of an element are identical; atoms of different elements are
different; law of constant composition; atoms are invisible



Question 7
Alpha Particle
Correct Answer
One type of radioactive particle; it is a essentially a helium nucleus; when this type
of particle is released, the mass of the atom is conserved and so is the atomic
number



Question 8
Silver
Correct Answer
Ag(+)



Question 9
Atoms
Correct Answer
Basic unit of matter which cannot be broken down and contain mostly empty space;
contains three parts: the electron, proton, and neutron




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,Question 10
Diprotic Acid
Correct Answer
Acid that has 2 hydrogens to donate



Question 11
Manganese
Correct Answer
Mn(2+) & Mn(3+)



Question 12
Avogadro's number
Correct Answer
6.022 X 10 ^ 23



Question 13
Ductile
Correct Answer
The ability to be pulled into wire



Question 14
Arsenate
Correct Answer
AsO4(3-)



Question 15
Oxalate
Correct Answer
C2O4(2-)




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, Question 16
Acid
Correct Answer
A substance that increases the hydrogen ion concentration of a solution.



Question 17
Metals
Correct Answer
Elements located on the left side of the periodic table that want to lose electrons



Question 18
Polar Covalent Bond
Correct Answer
A bond between 2 nonmetal atoms that have different electronegativities and
therefore have unequal sharing of the bonding electron pair.



Question 19
Acids
Correct Answer
Always start with hydrogen; donate a proton in a solution



Question 20
lewis dot symbol
Correct Answer
shows the valence e- for an element



Question 21
F Orbital
Correct Answer
The orbital with the highest energy; it has seven orbitals and can hold 14 electrons




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