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| A group of atoms held together by covalent bonding that have no overall net charge are called what? |
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| carbon-12 carbon-13 and carbon-14. |
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| Reaction when bonds are formed or broken. |
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| Is when the chemical reaction does not change. |
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| Each element in a column has the same number of electrons in the outer energy level or shell is called what? |
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| how many naturally occurring elements are there? |
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| there are 92 naturally occurring elements |
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| why does water dissolve many molecular and ionic compounds? |
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| water dissolves many compounds because it is polar. |
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| The area where electrons move about the nucleus is called what? |
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| The time it takes half of the atoms in a radioactive substance to disintegrate. |
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| Schrodinger describes the electrons as being where? |
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| The area is the electron cloud. |
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| Any two or more elements NA+CI |
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| Substances that undergo chemical reactions are called what? |
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| Type of bond that is a weak chemical bond formed by the attraction of positively charged hydrogen atoms to other negatively charged atoms. |
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| The substance that dissolves a solute. |
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| what happens in order for a chlorine atom to become a chloride ion? |
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| When a chlorine atom gains an electron. |
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| Small particles of an element that has the characteristics of that element. |
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| The motion of random movement of particles is called? |
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| What is number on the pH scale that is neutral? |
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| The type of element that is shiny, ductile,malleable,good conductor of heat and electricity. |
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| what would you find in the middle of a nucleus? |
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| Positively charged protons and neutrons. |
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| Each element in a row is in the same energy level is called? |
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| Colloids are mixtures whose particles are larger than the size of a molecule but smaller than particles that can be seen with the naked eye. Colloids are one of three major types of mixtures, the other two being solutions and suspensions. The three kinds of mixtures are distinguished by the size of the particles that make them up. |
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| Substances composed of atoms of two or more different elements that are chemically combined. |
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| chemical Bond when two atoms share electrons is what? |
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| Is a substance that can't be broken down into simpler chemical substances. |
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| The time it takes half of the atoms in a radioactive substance to disintegrate. |
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| An atom or group of atoms that gain or lose electrons;has an electrical charge. |
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| They are atoms of the same element that have different numbers of neutrons in the nucleus. |
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| Anything that has mass and occupies space. |
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| is the number of protons that are found in the nucleus. |
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| Spontaneous disintegration of a radionuclide. |
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| Mixture in which one or more substances are distributed evenly in another substance. |
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