Theory
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
|
|
||||
|---|---|---|---|---|---|
| What is the Theory of the 4 Essences? | All forms of matter were a combination of earth, air, fire, and water.
Many Greeks believed this.
🗑
|
||||
| Who was the Greek Philosopher who believed in the Theory of the 4 Essences? | Aristotle
🗑
|
||||
| Who was the scientist who opposed the Theory of 4 Essences, and came up with the idea of an "atom"? | Democritus
🗑
|
||||
| What were Alchemists? | Scientists of the Middle Ages
Tried to change cheap metals into gold
Tried to stop aging
Tried to cure diseases
🗑
|
||||
| When two or more elements combine to form a new substance, what is this known as? | A compound
🗑
|
||||
| What are some examples of common compounds | Water
salt
sugar
rust
tarnish
ammonia
🗑
|
||||
| Who was John Dalton? | An English school teacher who proved Democritus was correct.
He proposed his own Atomic Theory.
🗑
|
||||
| What is John Dalton known as? | the "Father of the Modern Day Atomic Theory"
🗑
|
||||
| Who was Marie Curie? | A Polish-born Scientist
Worked most of her life with her husband, Pierre
They studied radioactive elements
🗑
|
||||
| What were the two elements Marie Curie and Pierre discovered? | Radium and Polonium
🗑
|
||||
| Who was Ernest Rutherford? | A British physicist
1911 discovered that atoms are mainly empty space
🗑
|
||||
| What did Ernest Rutherford discover in 1918? | The proton
🗑
|
||||
| Who was Niels Bohr? | A scientist who initially believed that electrons flew around the nucleus in orbits
🗑
|
||||
| What was Niels Bohr's changed idea? | Electrons were forced on shells (orbitals) outside of the nucleus.
He believed electrons could "jump" from one shell to another.
🗑
|
||||
| What is an element's atomic number? | The number of protons and neutrons in the nucleus of the atom.
The atomic mass is the total number of nucleons in an atom.
🗑
|
||||
| What is the atomic mass of an element equal to? | The number of protons and neutrons in the nucleus of the atom.
🗑
|
||||
| What is atomic mass? | The total number of nucleons in an atom.
🗑
|
||||
| How do you determine the number of neutrons in an atom's nucleus? | Subtract the atomic number from the atomic mass
🗑
|
||||
| How many known elements are existing? | 118
🗑
|
||||
| How many elements can be found in nature? | 94
🗑
|
||||
| Why can the number of protons and electrons in an element be the same? | Since protons have a positive charge and the electrons have a negative charge, the overall charge of an atom is normally neutral
🗑
|
||||
| What does Fermium have an atomic number of? Mass? How many neutrons are in the nucleus of an atom of fermium | Atomic number- 100
Mass- 257
Neutrons- 157
🗑
|
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:
Sarahhh11
Popular Science sets