Chemistry Review
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| What is the study of matter and its changes? | Chemistry
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| What are the building blocks of matter? | Atoms
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| A light, negatively charged particle of the atom is called? | electrons
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| A heavy, positively charged particle of the atom is called? | protons
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| A heavy, neutral (no charge) particle of the atom is called? | neutrons
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| Which particles are found in the nucleus of the atom? | protons and neutrons
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| Which particles are found outside of the nucleus? | electrons
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| Which particles have the most mass? | protons and neutrons
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| What are the first 4 energy levels in an atom called? | K-L-M-N
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| How many electrons can the K energy level hold? | 2
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| How many electrons can the L energy level hold? | 8
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| How many ellectrons can the M energy level hold? | 18
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| How many electrons can the N energy level hold? | 32
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| What is an ion? | An atom with a positive or negetive charge
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| How does an atom become a positive ion? | loses electrons
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| How does an atom become a negetive ion? | gains electrons
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| What chart arranges elements in order of increasing atomic number? | periodic table of elements
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| What does the atomic number tell us about the atom? | The number of protons & electrons (APE= Atomic # = Protons = Electrons)
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| What does the atomic mass tell us about the atom? | The number of protons and neutrons
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| How do we calculate the number of neutrons in an atom? | Atomic Mass - Atomic # = Neutrons(MAN = Mass - Atomic # = Neutrons)
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| What do we call the verical (up and down) columns of the periodic table? | Groups/Families
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| What do we cann the horizontal (back and forth) rows of the periodic table? | periods
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| What do elements in the same Period have in common? | Same number of energy levels
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| What do elements in the same Group have in common? | Same number of valence electrons
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| What are valence electrons? | Electrons in the atoms outermost energy level, determines reactivity
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| How many valence electrons does an atom need to be stable? | 8 valence electrons OR a full outer energy level
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| What type of elements are shiny solids that are good conductors of heat and electricity? | Metals
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| What do metals do when they form a compound? | Lost electrons
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| What type of elements are brittle solids, liquids and gases that are poor conductors of heat and electricity? | Nonmetals
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| What do nonmetals do when they form compounds? | Gain electrons
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| Which elements seldom react with other elements and are in group 18? | Noble Gases
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| A process by which two or more atoms react to form something new is called a | Chemical Reaction (change)
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| The substance around at the start of a reaction that you are mixing together are the | reactants
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| The substances around at the end of a chemical reaction that are made are the | products
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| What do all chemical reactions need in order to happen? | Change in energy
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| Reactions that absorb energy and form chemical bonds are called | Endothermic
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| Reactions that release energy and break chemical bonds are called | Exothermic
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| What are the four indicators of a chemical reaction? | 1. Formation of a gas2. Formation of a precipitate 3. Change in color4. Change in temperature
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| What do we call a short hand way of writing the name of a substance? | Chemical Formula
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| What does the law of conservation of matter state? | Matter can never be create or destroyed during a chemical reaction
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| How can we change the rate of a chemical reaction? | 1. Increase the surface area2. Increase the temperature3. Increase the concentration
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