Chapter 11 - Introduction to Atoms
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
|
|
||||
|---|---|---|---|---|---|
| atom | the smallest particles of an element that retain the properties of the element
🗑
|
||||
| theory | is a unifying explanation for a broad range of hypotheses and observations that have been supported by testing
🗑
|
||||
| electrons | negatively charged particles
🗑
|
||||
| model | a representation of an object or system
🗑
|
||||
| nucleus | positively charged region in the center of the atom; extremely dense
🗑
|
||||
| electron clouds | regions inside the atom where electrons are likely to be found
🗑
|
||||
| protons | positively charged particles of the nucleus
🗑
|
||||
| atomic mass unit | SI unit used to express the masses of particles in atoms; each proton is weighs one of these
🗑
|
||||
| neutrons | the particles of the nucleus that have no charge and are identical
🗑
|
||||
| atomic number | number of protons in the nucleus
🗑
|
||||
| isotopes | atoms that have the same number of protons but have different number of neutrons
🗑
|
||||
| mass number | the sum of the protons and neutrons in an atom
🗑
|
||||
| atomic mass | the weighted average of the masses of all the naturally accurring isotopes of an element
🗑
|
||||
| four forces at work in an atom | gravity, electromagnetic force, strong force, weak force
🗑
|
||||
| Democritus | said atoms are small indivisible particles of a single material and always moving
🗑
|
||||
| Aristotle | said everything made of water, air, earth, and fire
🗑
|
||||
| John Dalton | expanded on Democritus' theory; everything made of atoms (cant be created, destroyed, or divided)
🗑
|
||||
| JJ Thomson | small particles inside the atom with negative and positive particles; used cathode-ray tube
🗑
|
||||
| Ernest Rutherford | student of thompson-1911
found out- nucleus and electrons flying around
🗑
|
||||
| Niels Bohr | danish scientist- 1913
electron paths and electrons jump levels
🗑
|
||||
|
🗑
|
Review the information in the table. When you are ready to quiz yourself you can hide individual columns or the entire table. Then you can click on the empty cells to reveal the answer. Try to recall what will be displayed before clicking the empty cell.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
Created by:
stmvocab
Popular Science sets