In Neil Bohr's atomic model the electrons move how?
a) like balls rolling down a hill
b) like planets orbiting the sun
c) like popcorn in a popcorn popper
d) like beach balls on waves
What is like planets orbiting the sun
100
According to John Dalton, when elements combine forming compounds the ratio of their masses is?
What is always the same?
100
What is unique for each given element?
What is atomic number or number or protons
100
What model describes where the electron most likely will be?
What is the electron cloud model?
200
Which subatomic particle has a negative charge?
What is the electron?
200
John Dalton's model of the atom is best described as...
a) a solid sphere
b) a plum pudding
c) a solar system
d) an electron cloud
What is a solid sphere?
200
How was the Bohr atomic model similar to Rutherford's model?
What is it described a nucleus surrounded by a large volume of space?
200
How many electrons are there in a neutrally charged carbon atom?
What is six?
200
What happened to cause an electron to move to a higher energy level?
What is it gained energy?
300
What charge do neutrons have?
What is none?
300
Who provided the first evidence that atoms contain subatomic particles?
Who is Thomson?
300
Each energy level has orbits, each orbit can contain how many electrons?
What is two?
300
What distinguishes an atom of one element from an atom of a different element?
What is number of protons (atomic number)?
300
Where are electrons located in Rutherford's atomic model?
What is outside the nucleus?
400
What is the mass number of an element that contains 15 protons, 16 neutrons, and 17 electrons?
What is 31 amu
400
Rutherford's gold foil experiment provided what evidence about the atom?
What is there is a dense positively charged mass in the center of an atom and lots of space?
400
How many electrons are in an atom's lowest energy level?
What is two?
400
The chemical symbol represents the what of an element?
What is it's name?
400
A glowing light is caused by electrons emitting energy as they...
What is move from a higher energy level to a lower energy level?
500
How do you determine the number of neutrons in an atom?
What is subtract the atomic number from the atomic mass?
500
Which part of Dalton's atomic theory was disproved by scientific evidence in the early 1900s?
What is atoms are indivisible particles?
500
Who's atomic model describes the atom as a huge stadium with a positively charge marble in the center?
Who is Rutherford?
500
The hardest form of carbon is what?
What is diamond
500
Atoms of the same element with different numbers of neutrons are called?