| A | B |
|---|
| Bonds which share electrons | Covalent |
| Weak bonds between two atoms are usually ____________ | Covalent |
| Bonds formed when one atom steals an electron from another | Ionic |
| When two atoms of the same element bond together they form a | Molecule |
| What are the two types of chemical bonds? | Ionic and Covalent |
| Compounds are formed when two or more ___________ atoms bond. | Different |
| When an atom gains an electron it becomes | negative |
| Most of the atom’s mass is concentrated in which part of the atom? | nucleus |
| All atoms want to have their outermost shells filled. This is usually how many electrons? | 8 |
| The atomic number of an atom is the number of | Protons |
| Name the three parts of an atom | Proton, neutron, electron |
| The melting point is a chemical or physical characteristic? | Physical |
| If an atom has an oxidation number of +2, how many valence electrons does that atom have? | 2 |
| What is the element for Au? | Gold |
| The family in the second column is called | Alkaline Earth Metal |
| The family in the column with carbon is called the ___________ family | Carbon |
| The family with Oxygen is called the ______________ family | Oxygen |
| The family with fluorine is called the _____________ family | Halogen |
| If an atom has an oxidation number of +1, how many valence electrons does that atom have? | 1 |
| If an atom has an oxidation number of +3, how many valence electrons does that atom have? | 3 |
| If an atom has an oxidation number of -3, how many valence electrons does that atom have? | 5 |
| If an atom has an oxidation number of -1, how many valence electrons does that atom have? | 7 |
| What happens to an atom that gains an electron? | It becomes negative |
| Which part of the atom is so small that it is not used to determine the mass of an atom? | Electron |
| Can you see atoms? | No |
| Who thought that all atoms of the same element would be the same? | Dalton |
| Who thought that different kinds of atoms would be different? | Dalton |
| Who thought that electrons were inside the atom like plum pudding? | Thomson |
| Who thought that there is a positive center of the atom? | Rutherford |
| Who proved there are subatomic particles that have no charge? | Chadwick |
| Who thought that electrons circle the atom in a cloud? | Schrödinger |
| Who was the scientist who developed the first model with a positive center? | Rutherford |
| Who developed the model with positive and negative charges spread throughout? | Thomson |
| who was the scientist who developed the model with electrons in specific orbits around the nucleus ? | Bohr |
| Who improved Bohr's model by adding the neutrons to the nucleus? | Chadwick |
| Bases, when dissolved in water, release a lot of ___________ ions in the solution | Hydroxide |
| _______________ characteristics of an object that describe how it can be changed into something new and different. | Chemical Change |
| When you change the mass of an object, you change which kind of property? Chemical or physical | Physical |
| When you change the volume of a substance, you change the physical or chemical property of that substance? | Physical |
| Anything that has mass and volume | Matter |
| Substances made of only one type of atom | Element |
| Substance that can be easily separated (each part has its own properties) | Mixture |
| Salt water is a mixture or compound? | Mixture |
| Sodium chloride is a mixture or compound? | compound |
| Oxygen is an element or compound? | Element |
| Substances that change in a chemical reaction are called | Reactants |
| Substances that are formed in a chemical reaction are called. | Products |
| High energy particles found in the atom are called | Electrons |
| Ice melting in a glass of iced tea is a physical or chemical change? | Physical |
| Is this a formula, symbol, or mixture? NH3 | Formula |
| Metals are called losers because they have a tendency to lose ____________________ in a chemical reaction | Electrons |
| Nonmetals are found on the ___________ side of the staircase on the periodic table | Right |
| Elements that have both characteristics of metals and nonmetals are called ___________ | Metalloids |
| All atoms want to have __________ electrons in their outermost shell | 8 |
| Lewis Dot diagrams help us understand how many ___________ an atom is able to make | Bonds |
| Atoms in the same __________ have similar chemical characteristics | Family |
| The periodic table has the atoms arranged by increasing number of _______________ | Protons |
| Why is the Nobel Gas family not able to bond with other atoms? | Complete outer shell |
| According to the Law of Conservation of Matter, when a reaction occurs, the atoms rearrange, but the number of atoms never __________ | Changes |
| What is the formula for density? | Density = Mass/volume |
| Name 2 ways you can separate a mixture | Filter, sorting, boiling point |
| When atoms gain electrons, they become more ____________ | Negative |
| You can tell how many electrons will be gained or lost by the _______________ number on the periodic table | Oxidation |
| Metal and nonmetal atoms bond to form ______________bonds | Ionic |
| Nonmetal and nonmetal atoms bond to form ____________ bonds | Covalent |
| Which of the subatomic particles has the most energy? | Electrons |
| What are the electrons involved in bonding called? | Valence electrons |
| When a chemical reaction absorbs energy (beaker feels cold), it is called ___________________ | Endothermic |
| When a chemical reaction releases energy (like heat from fire), it is called | Exothermic |
| When a metal and nonmetal bond, they form a ____________ bond | Ionic |
| What is the greatest number of valence electrons an atom can have? | 8 |
| When a covalent bond is formed, the product is called a _____________ | molecule |
| Elements in a column of the periodic table are called what? | Families |
| When an atom loses an electron it becomes | Positive |
| How can you balance this equation? H2O2 ---------- + O2 | Put a coefficient of 2 before H2O2 and H2O |
| What is the simplest type of a pure substance? | Element |
| Who has the same number of valence electrons? Same family or same period? | Family |
| The atomic mass of an atom is the number of the ____________ + _____________ | protons + neutrons |
| Metals are located on which side of the periodic table? | Left |
| The number of electrons in a neutral atom is equal to the number of _____________ | Protons |
| I am ductile, malleable, good conductor of electricity and heat. Who am I? | Metal |
| The family in the first column is called ________________ | Alkali Metals |
| Where are nonmetals located on the periodic table? | Right of the staircase |
| The family in the column with Nitrogen is called the ___________ family | Nitrogen |
| There is someone in the Boron Family that is a not a metal. Who is it? | Boron or Aluminum |
| The family that has Helium is called the _____________ _______ family | Nobel Gas |
| Which type of atom shares characteristics of both metal and nonmetal? | Metalloids |
| If an atom has an oxidation number of -2, how many valence electrons does that atom have? | 6 |
| When ions bond, they become ___________________ | neutral |
| An ionic bond has to involve two atoms with a ________ and _________ charge. | Positive and negative |
| This type of bond shares electrons, happens between nonmetals only, and is quite weak…. | Covalent |
| What happens to an atom that loses an electron? | It becomes positive |
| What is a process called that forms a new product? | Chemical change |
| Who was the first to think that atoms are not divisible? | Democritus |
| When a substance goes from liquid to solid, is this a chemical or physical change? | Physical change – change of state |
| Who thought that there were orbits that electrons follow? | Bohr |
| How do you know a chemical reaction occurs? | New product is formed |
| What was the importance of Rutherford’s experiment? | found nucleus |
| A shorter, easier(?) way to show chemical reactions, using symbols instead of words is called ___________ | Chemical equation |
| Who said that electrons are not in a specific orbit but are in a cloud? | Schrodinger |
| What does the coefficient tell you? Number of | number of molecules or atoms of each substance in the reaction |
| The pH scale measure the concentration of what ? | Hydrogen ions |
| Acids, when dissolved in water, release a lot of __________ ions in the solution | Hydrogen |
| What is formed when an acid and base are allowed to react? | water and salt |
| ______________ Characteristics of an object can be described without turning the object into something new and different. | Physical |
| What is it called when an acid and base react? | Neutralization |
| When you change the pH of a substance, you change the chemical or physical properties of that substance? | Chemical |
| Two or more different kind of atoms bonded together make a | Compound |
| Sweet tea is a mixture or a compound? | Mixture |
| Water is an element or a compound? | Compound |
| The water that beads on the outside of my ice tea glass is water vapor forming a liquid. Is this a physical or chemical change? | Physical |
| Chemical formulas are made of ______________ which represent elements | Symbols |
| Metals are found on the _____________ side of the staircase on the periodic table | Left |
| The number of protons must always remain the same in an atom. The number of ______________ or _____________ can change. | neutrons or electrons |
| Metalloids are located on the ____________ periodic table | Staircase |
| A physical property of matter is density. If you change the volume of chalk, does that change the density? | No |
| Atoms in the same ___________ have the same number of valence electrons | Family |
| When atoms bond together, they form a _______________ | Compound |
| ______________ are formed when two atoms of the same kind form a bond between them. | molecules |
