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34 Cards in this Set

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  • Back
Trace elements
elements that an organism only need minute quantities of and only in certain species
Neurons
electrically neutral
Protons
one positive charge
Electrons
one negative charge
Atomic nucleus
dense core of neutrons, protons and electrons at the center of an atoms
What makes electrons move?
the attraction between opposite charges
What two subatomic particles are almost identical in mass?
protons and neutrons
Dalton
atomic mass unit
Which two subatomic particles balance each other with equal presence?
protons and electrons
Stable isotope
does not tend to lose particles
Radioactive isotope
nucleus decays spontaneously and gives off particles and energy
What kind of subatomic particles interact in chemical reactions?
electrons
Potential energy
the energy that matter stores because of its position or location
Energy level/electron shell
different states of potential energy that electrons in an atom have
Valence electrons
the outer electrons in a shell
What makes an atom chemically unreactive?
having a completed valance
Orbital
the 3 dimensional space where an election is found 90% of the time. No more than 2 electrons to each
What particles are involved when atoms interact to complete their valence shells?
the unpaired electrons
Chemical bond
attractions that cause atoms to stay close together
Molecule
two or more atoms held together by covalent bonds
Structural formula
notation that represents both atoms and bonding (H-----H)
Molecular formula
indicates what atoms a molecule consists of
Radioactive isotope
nucleus decays spontaneously and gives off particles and energy
What kind of subatomic particles interact in chemical reactions?
electrons
Potential energy
the energy that matter stores because of its position or location
Energy level/electron shell
different states of potential energy that electrons in an atom have
Valence electrons
the outer electrons in a shell
What makes an atom chemically unreactive?
having a completed valance
Orbital
the 3 dimensional space where an election is found 90% of the time. No more than 2 electrons to each
What particles are involved when atoms interact to complete their valence shells?
the unpaired electrons
Chemical bond
attractions that cause atoms to stay close together
Molecule
two or more atoms held together by covalent bonds
Structural formula
notation that represents both atoms and bonding (H-----H)
Molecular formula
indicates what atoms a molecule consists of