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Biology test thur
| Question | Answer |
|---|---|
| Atoms | the basic building blocks of matter |
| Elements | Subtances made up of one kind of matter |
| Compound | two or more types of atoms combined |
| Atomic number | the number of positive charges or protons in the nucleus |
| Mass Number | the total number of neutrons and protons in the nucleus |
| Molecule | When two or more atoms combine and act as a single particle |
| Covalent bond | a chemical bond is form by the sharing of electron |
| ionic bond | the force of attraction between ions |
| ions | an atom that has excess charge |
| chemical formula | the info about a compound |
| structral formula | a kind of chemical formula |
| law of conservation of mass | states that matter can be niether created or destroyed |
| Mixture | subtances that are phyically mixed |
| Solution | homogenious mixture |
| Solvent | liquid subtance |
| solute | subtance which dissolves in solvent |
| Suspention | A mixture that seprates |
| Unstable isotopes that emit chared paritcles are know as? A) compounds b)diatomic molcules c)ions d) radioactive | RADIOACTIVE |
| A pH greater than 7 reresents a(n) a) elements b)base c)acid d)salt | B - BASE |
| H2+O2------> H2O What before the? | Reactant |
| H2+O2------> H2O whats after the arrow | Product |
| on the pH scale what is 0-6 | Acids |
| What is 7 on the pH scale | Neutral |
| Base + Acid = what is this call | Neutral |
| neutralization | the result when you mix a acid with a base |
| True or False? If you have an Atom with 17 electrons it must have 17 N | False |
| True or False? Protons= Electrons | True |
| What is the capcity of the first energy level of and atom. | 2 |
| What is the capcity of the the second energy level of an atom. | 8 |
| What is the capcity of the third energy level of a atom. | 18 |
| How many covalent bonds can H have | 1 |
| How many covalent bonds can O have. | 2 |
| How many covalent bonds can N have? | 3 |
| How many covalent bonds can C have? | 4 |
| What are the negatives in an atom?it | electrons |
| What cause acid rain? | occurs when acid fossil fuels are burn (Sulfur and Nitrogen) |
| 2C3 How many carbons | 6 |
| 5H201 H= O= | H=10 O=5 |
| What is a indicator use for? | to determine the pH |
| List the 7 diatomic elements? | N2, O2, F2, CL2, B2 , 12 H2 |
| Pariticle Location Charge Mass Proton ? ? ? | Location - nucleus Charge - 1 Mass -1 |
| Pariticle Location Charge Mass Neuron ? ? ? | Location-nucleus Charge - 0 Mass-1 |
| Pariticle Location Charge Mass electrons ? ? ? | Location Energy Levels Charge -1 Mass .0005 |
| Why should chemical equations be written as balanced equation? | Because in chemical eqution no matter is lost or gain |
| Use the term solute and solvent to discribes how to make salt Solution. | Salt isthe solute that dissolves in the solvent to produce a salt solution |
| Give the of colvalent bonds each of the following atoms can form. Hydrogen - ? Oxygen - ? Nitrogen- ? Carbon - ? | Hydrogen - 1 Oxygen - 2 Nitrogen- 3 Carbon - 4 |
| Explain Why electrons determine an atoms chemical properties? | When elements react the electrons are either lost, gain, or shared. |
| Colloidal dispersion | A colloidal dispersion is a mixture of two substances, one of which is distributed evenly throughout the other. The substance occurring in greater quantity is called the dispersing |
| Acid produces _________ | •acids produce H+ |
| Acid | a compound capable of neutralizing alkalis |
| Base | A weak acid that has acid and base forms with sharply different colors. |
| pH | pH is a measure of effective concentration of hydrogen ions in a solution. |
Created by:
lizzyg96
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