Chem Quiz for 11/9/23

Question 1

Democritus

Answer 1

Matter can be broken down into smaller pieces

Question 1

Aristotle

Answer 1

. Central region made up of 4 elements: earth, air, fire, water
. All matter is made up of only these 4 elements

Question 2

The Alchemists

Answer 2

. People looking for gold
. Potion that would keep you young

Question 3

John Dalton

Answer 3

Known as the Father or Atomic Theory

Question 4

John Dalton’s Theory Of An Atom

Answer 4

. All elements are composed of indestructible atoms
. Atoms of the same element are alike
. Atoms of different elements are different
. Atoms combine to form compounds
. In compounds, atoms are joined in definite whole- number ratios
. In each element, atoms have a unique mass

Question 5

Amedeo Avogadro

Answer 5

. STP= Standard Temp present
. 1 mole= 6.02x10x23 atoms

Question 6

J.J. Thomson

Answer 6

. Discovered atoms had electrons
. ‘‘Atom is like plum pudding’’

Question 7

Thomson’s model

Answer 7

. Neg charged electrons are surrounding the nucleus which gives the atom a neutral charge

Question 8

Ernest Rutherford

Answer 8

. responsible for discovering the nucleus using a gold-foil experiment

Question 9

Rutherford’s Experiment

Answer 9

. Positive charged nucleus is in the middle of the atom

Question 10

Niels Bohr

Answer 10

. Discovered that electrons were present in the atom and circled the nucleus

Question 11

Bohr’s model

Answer 11

. Electrons move around the nucleus in distinct orbitals
. Similar to the way our solar system is set up