1-11 Various scientists

Question 1

Democritus coined the term _______ which means ________

Answer 1

Democritus coined the term atomos which means not able to be divided

Question 2

Democritus said that an atom…

Answer 2

Would eventually not be able to be cut up

Question 3

Democritus’s model looks like

Answer 3

A ball

Question 4

Democritus’s model still stands today because…

Answer 4

Because the idea that there is nothing smaller than an atom that still had properties of that type of matter is correct.

Question 5

Dalton’s year

Answer 5

1803

Question 6

Dalton Scientifically proved these three ideas about atoms:

Answer 6

1. All substances are made of atoms. Atoms are small particles that cannot be created, divided, or destroyed.
2. Atoms of the same element are exactly alike, and atoms of different elements are different.
3. That multiple atoms can join with other atoms to make new substances.

Question 7

Dalton’s model looks like…

Answer 7

A bowling ball

Question 8

These parts of Dalton’s theory still stand today:

Answer 8

That atoms are the basic building blocks of all matter and That all substances are made out of atoms.

Question 9

Thompson’s year

Answer 9

1897

Question 10

Thompson proved that an atom can be…

Answer 10

Divided into an even smaller part

Question 11

Thompson showed there were ______ charged particles, now called ______.

Answer 11

Thompson showed there were negatively charged particles, now called electrons.

Question 12

Thompson’s model was called ______ because…

Answer 12

Thompson’s model was called The Plum Pudding Model because The plum represents the negativity charged particles and the pudding represents the positively charged particles.

Question 13

The plum pudding model was also called the ______

Answer 13

Chocolate chip ice cream model

Question 14

Rutherford’s year:

Answer 14

1909

Question 15

Rutherford tested _______’s theory with his famous __________.

Answer 15

Rutherford tested Thompson’s theory with his famous gold foil experiment.

Question 16

Rutherford found there was a ________ charged center of the atom called _______, surrounded by the _______ charged _________.

Answer 16

Rutherford found there was a positively charged center of the atom called nucleus, surrounded by the negatively charged electrons.

Question 17

Bohr’s year:

Answer 17

1913

Question 18

Bohr proposed that _______ moves in _________ or __________ around the _______.

Answer 18

Bohr proposed that electrons moves in certain paths or energy levels around the nucleus.

Question 19

In bohr’s theory, levels were like…

Answer 19

Rungs on a ladder

Question 20

Erwin Schrodinger’s & Warner Heisenberg’s year:

Answer 20

____

Question 21

Erwin Schrodinger & Warner Heisenberg helped us understand that electrons do NOT travel in ______,; only that there are ______ where electrons are _______ to be found.

Answer 21

Erwin Schrodinger & Warner Heisenberg helped us understand that electrons do NOT travel in definite paths,; only that there are regions where electrons are likely to be found.

Question 22

Democritus’s year

Answer 22

440 BCE