Whose model of the atom was referred to as the plum pudding model?
J.J. Thomson's model.
100
A neutral atom will contain the same number of
Protons and Electrons
100
Na-24 has how many neutrons?
13
100
How many electrons can be described by the following quantum number?
6px
2
200
Which Law?
A given compound must always contain the same elements in the same ratio in order to have the properties of that compound.
The law of definite composition
200
Which part of the atom was discovered in the gold foil experiment?
Nucleus/Proton
200
What is the mass of 1 neutron?
1 amu
200
Using your periodic table, calculate the number of electrons in an atom of Gold.
79
200
Light is emitted from a gaseous atam when an electron returns from a __________ to its ground state.
Excited state
300
Which law?
In a chemical reaction, atoms can not be created or destroyed. Atoms can be separated, joined, rearranged in a chemical reaction but they must all be accounted for after the reaction is complete.
The law of conservation of mass
300
Which scientist is credited with proposing that electrons are found in specific energy levels?
Niels Bohr
300
Atoms of the same element, but have a different atomic mass are called?
Isotopes
300
Calculate the atomic mass of an atom that contains 33 protons, 32 electrons, and 37 Neutrons.
70
300
What does AMU stand for?
Atomic Mass Unit
400
The fact that there are isotopes disproves which of Dalton's 5 principles?
Atoms of the same element are the same
400
Who is the scientists credited with discovering the neutron?
Chadwick
400
3px +1/2 Is an example of what?
Quantum number
400
The most common hydrogen atom contains how many neutrons?
0
400
A region around the nucleus where there is a high probability of finding an electron.
Orbital
500
The fact that water and hydrogen peroxide have different properties is described by which of Dalton's laws?
The law of multiple proportions
500
In Latin, nucleus means what?
Little nut
500
Which principle?
No 2 electons will ever have the exact same set of quantum numbers (because they would spin opposite).
Pauli Exclusion Principle
500
An element exists in 3 isotopes with the following abundances. What is the weighted average atomic mass?
50% 50amu
30% 55amu
20% 60amu