Lesson 110, Living By Chemistry

When atoms form covalent bonds, electrons are ______. – shared
Homogeneous mixture – A mixture with a composition that is always the same no matter what part of the sample you are observing
Beriberi is associated with deficiency of vitamin:
a A
b C
c niacin
d thiamine – d thiamine
Acidosis and alkalosis are best defined as fluctuations in blood pH and C02 content due to changes in:
a Bohr effect
b 02 content
c bicarbonate buffer
d carbonic anhydrase – c bicarbonate buffer

c Chemical cause of alkalosis and acidosis.

Period – a row on the periodic table
Mixture – An impure substance made up of different substances that can easily be separated.
Hess's Law of Heat Summation – The heat change for a reaction is the same whether the reaction takes place in one step or several steps.
What did JJ Thompson believe about atoms? – 1. Small
2. Spherical
3. Solid
4. Divisible
5. Net-neutral (atoms are easily balanced by positive and negative mass)
What does the displayed formula show? – The relative positioning of all the atoms in a molecule and the bonds between them.
What did JJ Thompson believe about atoms? – 1. Small
2. Spherical
3. Solid
4. Divisible
5. Net-neutral (atoms are easily balanced by positive and negative mass)
Solid – Matter that has a definite volume and a definite shape
Photodissociation – is the removal of one or more atoms from a molecule when it absorbs energetic electromagnetic radiation.
stereoisomers – compounds with the same structural formula but different arrangements of atoms in space
Physical changes include – grinding, cutting, boiling
What did JJ Thompson believe about atoms? – 1. Small
2. Spherical
3. Solid
4. Divisible
5. Net-neutral (atoms are easily balanced by positive and negative mass)
iron ring – used to support laboratory equipment when attached to a ring stand
Describe Molten Electrolysis – One solution with cathode and anode.
No salt bridge.
Connected to pour supply that must supply, at the very least, a voltage equal to the negative E'cell

Cations reduced at cathode. Na+ to Na(s)
Anions oxidized at anode. 2Br- to Br2(g)

1. Nonspontaneous reaction, requires energy
2. Molten salt Na+(l) + Br+(l)
3. Produces elements Na(s) + Br2(g)

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