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| Question | Answer |
| What are the types of the following elements lithium, oxygen, krypton, and aluminum (i.e., metalloids, metal, nonmetal, and noble gas ? | metal, nonmetal, noble gas, and metalloid |
| Who was the first scientist to come up with the atomic theory? | John Dalton |
| What is the mass number of an oxygen atom that has 8 protons and 9 neutrons? | 17 |
| What group of elements is considered to be unreactive? | noble gases |
| What subatomic particle has the least mass? | electron |
| If the protons increase across the periodic table, what happens to the electrons? | they increase |
| What is the name of the group of elements that are the most reactive and what group are they in? | Group 1 |
| How many neutrons does Argon contain? | 22 |
| What is an isotope? | atoms of the same element that have different mass numbers |
| What experiment was Rutherford credited with? | gold foil experiment |
| Who was the scientist who had a model of fixed orbitals for electrons? | bohr |
| What is the name for an element in group 1? | alkali metals |
| What has to happen for an atom to be electrically neutral? | it has the same number of protons and electrons |
| What is the average atomic mass for cesium with 75% 133, 20% 132,and 5% 134? | 132.85 |
| How many electrons are in a Mg atom? | 12 |
| If you have 55 protons and 82 neutrons for Cesium, what is the mass number? | 137 |
| What group would it be the most difficult to remove 1 electron? | group 17 |
| How did Mendeleev arrange the periodic table? | by atomic mass |
| If you have Hydrogen, Lithium, and Sodium, what are the two similarities (properties) among these elements? | they have similar physical and chemical properties |
| What is the one thing that identifies and element? | atomic number |