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37 Cards in this Set
- Front
- Back
Protons and neutrons can be found were?
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in the atoms nucleus.
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Where are the electrons located?
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On the outside of an atom.
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Atomic mass is decide from the number of?
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Protons and neutrons
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You can find the number of neutrons by?
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Atomic number - mass number
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There are a same number protons as there is what? in a element
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Electrons
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Chemicals are in what?
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All living things
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Living things contain how many chemical elements?
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25
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How many elements are natural occurring.
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92, the rest are man made
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Which four makeup 94.4% of the body?Greatest to Least
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Oxygen, Carbon, Hydrogen, Nitrogen.
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Different arrangements of the atoms determine what?
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The unique properties
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The smallest unit of an element is what?
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Atom
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The electron arrangement determines what?
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The chemical properties of atoms
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Atoms are stable when?
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The outer-shell is full.
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How many can the first shell can hold? What about the second and third shell?
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first shell can hold 2. the second and third shell can hold 8
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These are the main types of chemical bonds between atoms from compounds.
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Ionic and Covalent.
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What is a ionic bond do?
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gives or takes(weak bond)
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Covalent bonds do what?
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join atoms into molecules through electrons sharing. share(strong)
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The chemical re activity of an atom depends on....
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number of electrons
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Molecuelse who share a equal amount of electrons are?
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non-polar.
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In a polar molecule one of part of the molecule is?
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Positive
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Hydrogen bonds make up?
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Water which is a cohesion
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Cohesion is?
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attraction force between molecules that are a like
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Surface tension is the result of?
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Cohesion of water molecules.
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Adhesion is?
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The attracive force between unlike molecules( like glass and water)
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Capillary action needs what to happen?
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Both cohesion and Adhesion
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Water hydrogen bonds do what to temperature?
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moderate (controls heat capacity)
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What is one way water can moderate temperature?
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Evoprative cooling
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What is the solvent of life?
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Water
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solution is?
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a homogeneous mixture of a liquid and one or more dissolved solutes
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water forms solution with?
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many polar and ionic compounds
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an aqueous solution is?
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An solution which water is a solvent.
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Cytoplasm is?
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a aqueous solution
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The chemistry of life is sensitive to Blank and Blank.
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Acid and basic conditions.
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If the number of H+ and OH ions are equal then?
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The solution is neutral
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Acidity is?
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Measured on the pH scale from 0-14 of most acids(pH is neutral)
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The pH of most cells is kept close to?
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7(neutral)
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Human blood remains between?
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7.34 and 7.44 (so we contain a buffer)
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