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Ansley - Atoms
Atoms; Atomic Theory
| Question | Answer |
|---|---|
| Who was Democritus? | a Greek philosopher who was the first to propose the idea of the atom - he called it atomos (meaning "can't be divided") |
| Rutherford's gold foil experiment identified _____________ in the positively charged center of the atom. | proton |
| His modern atomic theory was the first time in 2000 years that science looked at the idea of the atom. Who is this scientist? | Dalton |
| His "plum pudding" (chocolate chip) model helped explain the newly discovered electron. | JJ Thomson |
| The Russian scientist who first arranged the periodic table | Dmitri Mendeleev |
| What is an atom? | the smallest unit of an element that maintains the properties of that element |
| Where is the positively charged proton found in the atom? | in the nucleus |
| Where is the positively charged electron found in the atom? | in the electron cloud surrounding the nucleus |
| Where is the positively charged neutron found in the atom? | in the nucleus |
| List the three subatomic particles and their charges? | 1. proton - positive (+) 2. neutron - no charge (0) 3. electron - negative (-) |
| What are the columns in the periodic table called? | families/groups |
| What are the rows in the periodic table called? | periods |
| The elements on the left side of the stair step line of the periodic table of elements are called _______________. | metals. |
| The group of elements that touch the stair step line on the periodic table of elements are called ________________. | metalloids. |
| The atomic number is the same as the number of ________________. | protons |
| To find the _________________ of the element, you add the protons and the neutrons. | atomic mass |
| Materials made up of the same type of atom are called__________________. | elements |
| The ______________ is the number of protons in the nucleus of an atom. | atomic number |
| Which element has 6 protons? | carbon?? (is there a picture for this one)? |
| How would the following be categorized: The object is shiny, ductile, and conducts electricity. | metal |
| Using a periodic table, which of the following are non metals: K, Si, O, Mg, Ne? | O (oxygen), Ne (neon) |
| Can a carbon atom have more than 6 atoms? Why or why not? | No - because if it had protons taken away or added, it would be a completely different element |
Created by:
ortht
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