Quiz 2 Cram

Question 1

Rutherford experiment

Answer 1

• started with positively charged alpha particles
  
  • shot them through gold foil
  • used a fluorescent screen to detect it

Question 2

Rutherford experiment observations

Answer 2

• most of the radiation went through the gold foil
  
  • there’s space around the atom
• some radiation rays went different directions at an angle
  
  • some parts of the gold foil have a positive charge so it would deflect the ray that was near it
• some deflected back
  
  • positive charge would bounce the ray back if it is close to the positive charge in the gold foil

Question 3

Progressive Atomic Theory

Answer 3

• Atom is composed of 3 types of subatomic particles
  
  • protons, neutrons, electrons

Question 4

protons

Answer 4

positive charge, found in the nucleus (mass: 1)

Question 5

neutrons

Answer 5

found in the nucleus (mass: 1)

Question 6

electrons

Answer 6

negatively charged found floating(orbit) around the nucleus

Question 7

the atomic number =

Answer 7

number of protons

Question 8

number of protons =

Answer 8

number of electrons

Question 9

Isotopes

Answer 9

atoms of the same element but with different masses (various versions of an element)
- different number of neutrons but same number of protons
- have the same atomic number because the number of protons stay the same
- you can predict the same amount of electrons in a neutral atom bc they are the same to protons

Question 10

neutron calculation =

Answer 10

mass # - # of protons

Question 11

Mass number =

Answer 11

number of protons + number of neutrons

Question 12

cathode

Answer 12

negative

Question 13

anode

Answer 13

positive

Question 14

Dalton’s Atomic Theory

Answer 14

1. Each element is composed of extremely small particles called atoms
2. All atoms of a given element are identical; but one elements atoms are different from another element’s atoms
3. Atoms of one element cannot change into toms of a different element; atoms can not be created or destroyed
4. compounds are formed when atoms of more than one element combine