| A | B |
|---|
| The attraction between polar water molecules and polar non-water molecules is called.... | adhesion |
| H-bonds are.... | 20% weaker than covalent and ionic |
| When two atoms of the the same nonmetal react, they often form a(an) | diatomic molecule |
| What is a physical property of ionic compounds? | tendency to shatter when struck |
| In the compound MgCl2, the subscript 2 indicates that | there are two chloride ions for each magnesium ion |
| Electronegativities levels tend to | increase from left to right across a period |
| Typically, atoms gain or lose electrons to achieve | a stable electron configuration |
| In a polar covalent bond, | electrons are not shared equally between atoms |
| Since water molecules are partially charged, they... | form H-bonds with one another |
| Substance A is a solid ionic compound. Substance B is a solid covalent compound. If you heated them both in the same container, what would happen? | Substance B would probably melt first |
| When two nitrogen atoms bond, they share three pairs of valence electrons. Why does this happen? | By sharing the electrons, each atom ends up with an octet. |
| Magnesium has two valence electrons, and oxygen has six valence electrons. What type of bonding is likely to occur between a magnesium atom and an oxygen atom? | Magnesium will give two electrons to oxygen and both will become ions. |
| Lithium has one valence electron. Bromine has seven valence electrons. How might they form a chemical bond? | Lithium donates an electron to bromine |
| Compared with nonmetals, the number of valence electrons in metals is generally | smaller |
| Which elements satisfy the octet rule without forming compounds? | noble gases |
| The positive charged ion in an ionic bond is called.... | cation |
| What prefix is used for a covalent bond that has 5 chlorine atoms? | penta |
| What is the oxidation number of Fe in the formula FeO | +2 |
| The negative charged ion in an ionic bond is called.... | anion |
| What is the chemical formula for copper 2 chloride | CuCl2 |
| How many shared pairs of electrons are there in the formula CO2 | four |
| If a substance hates water it is said to be... | hydrophobic |
| What feature allows pins to be suspended on the top of water? | surface tension |
| What is the oxidation number of aluminum in the formula AlCl3 | +3 |
| If a substance has a strong affinity to water but also hates it, it is said to be... | amphipathic |
| Attractions between neighboring cations and anions keep the ions in fixed positions called... | crystal lattices |
| What is the chemical formula for iron 3 oxide | Fe2O3 |
| The attractions among water molecules is stronger than the attraction among carbon dioxde molecules because... | water molecules form h-bonds |
| What is the name of the compound SiCl4 | silicon tetrachloride |
| What is the name of the compound formed from potassium and iodine | potassium iodide |
