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Flashcards in Chapter 2 Deck (33):
1

Element

Pure substance that consist entirely of atoms with the same, characteristic number of protons

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Proton (p+)

Positively charged particle of an atom's nucleus

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Electron (e-)

Negatively charged particle that can occupy a volume of space (orbital) around an atom's nucleus

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Neutron

Uncharged particle of an atom's nucleus

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Isotope

One of two or more forms of an element, the atoms of which differ in the number of neutrons

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Radioisotope

Unstable isotope that emits particles and energy when its nucleus disintegrates

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Tracer

Molecule that has a detectable substance attached (such as a radioisotope)

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Ion

Atom that carries a charge after it has gained or lost one or more electrons

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Molecule

Two or more atoms

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Compound

Molecules of two or more different elements
ex.water

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mixture

Intermingling of two or more elements or compounds in proportions that can vary

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solute

molecule or ion dissolved in a solvent

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acid

substance that releases H+ when dissolved in water

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Base

substance that accepts H+ when dissolved in water

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Salt

Substance that releases ions

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Charge

Electrical property that attracts or repels other subatomic particles

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Protons

positive charge

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Neutrons

No charge

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Electrons

Negative charge

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Atomic Number

The number of protons

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mass number

total number of protons and neutrons in nucleus

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chemical bond

attractive force that rises between two atoms when their electrons interact .

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nonpolar

atoms in the bond are sharing electrons equally

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polar

do not share electrons equally

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hydrogen bonds

are weak

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pH

measure of the number of hydrogen ions in a solution

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kinetic energy

energy in motion

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Potential energy

stored energy

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Ionic bonds

mutual attraction between opposite charges

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Solution

two or more substances

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isotope

same number of protons, diff number of neutrons

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covalent bond

strongest bond, free election, wants to share

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cohension

water molecules held closely together bc hydrogen bond