Question | Answer |
In 440 B.C He was the first to have the theory of uncutable particles called atoms. Who is he? | Democritus |
Around 384-322 B.C He denied Democritus' theory. Who is He? | Aristotle |
He created the atomic theory. 1700's. Who is he? | John Dalton |
1897. he makes the Cthode ray tube and predicts there are small particles inside atoms. Who is He? | J.J Thomson |
1909. he created the "shooting gallery experiment" and the first model for the atom. Who is He? | Ernest Rutherford |
1913. He predicted electrons jukped between levels. Who is he? | Niels Bohr |
The Modern Theory of The Atom? | Electron clouds, paths of electrons cannot be predicted. |
Whats an Atom? | Is the smallest particle which an element is formed and divided. |
Who is the "father" of the periodic table? | Mendeleev |
The Periodic Law? | Elements are periodec according to their chemical #'s |
Whats chemical bonding? | The joining of atoms to form new substances |
This is the Horizontal ROW on theperiodic table | period |
This is the vertical column on the periodic table | group |
What is an ionic bond? | When oppositly charged ions bond |
Whats a chemical reaction? | When one or more substances undergo change. |
Whats the law of conservation of mass? | Mass can never be created or destroyed |
What is a synthesis reaction? | when 2 elements form 1 |
Decomposition reaction? | When 1 element breaks to 2 |
Exothermic? | energy goes out |
Endothermic? | Energy goes in |
what year was sputnik1 launched? | 1957 |