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whats the difference between an ion and a compound?
an ion is a type of atom and loses/gains electrons. With a compound, it uses atoms and bonds them together; it doesnt lose any
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whats the difference between an atom and an element?
an atom is the simplest unit of matter, and an element is made up of an atom.
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_ bonds give/receives electrons (ions)
ionic
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_ bonds are weaker than the others
ionic
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_ bonds hold sodium chloride together
ionic
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_ and _ bonds both attract positive and negative
ionic and hydrogen
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_ forces cause Ionic and Hydrogen bonds to bond
electrical
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Ionic bonds, Hydrogen bonds, and covalent bonds form _
compounds
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Hydrogen bonds form between _
molecules
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attraction between slightly positive hydrogen ion and slightly negative hydrogen ion
hydrogen bond
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_forms when atoms share electrons
covalent bonds
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_ forms through the electrical force between oppositely charged ions
ionic bond
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how is cellular respiration like exothermic?
it breaks down food to release energy
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whats an example of exothermic?
cellular respiration
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animals that light up.
bioluminescense
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_ releases more energy than taken in
exothermic
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enzymes are made up of _
proteins
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_=biological catalyst
enzyme
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activation energy is lowered by a _
catalyst
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_ is the amount of energy to start a chemical reaction
activation energy
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what does the arrow of the chemical reaction mean?
yields
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the arrow in the chemical reaction tells the _ of the reaction
direction
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where does a hydrogen bond occur?
between molecules
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_ are electrons that are equally shared so they have no charges
nonpolar bonds
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_ is always the greater amount
solvent
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an _ brings things close so they can react.
enzyme
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_ bonds are strong due to sharing.
covalent
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_ bonds are weak due to attraction between charges
ionic
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atoms share pairs of electrons in _ bonds
covalent
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positive and negative attract, which causes _
an ionic bond
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Long chains of amino acids are found in _
proteins
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DNA and RNA are two types of _
nucleic acids
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Fats, oils, and cholesterol are all types of _
lipids
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the attraction among molecules of different substances is called _
adhesion
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the four main types of carbon-based molecules in organisms are carbohydrates, lipids, nucleic acids, and _.
proteins
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acidic solutions that have a ph are:
B) less than 7
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attractions between water molecules are called _.
polar bonds
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atoms r not composed of:
B) chemicals
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The smallest unit of matter is the _
atom
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