What is the number of protons or the number of electrons in a neutral atom of an element?
200
Mass number of neon
What is 20 amu?
200
Rutherford's gold foil experiment provided evidence for the existence of this in an atom
What is the nucleus?
200
Neutrons in Ti-50?
What are 28 neutrons?
200
Describe how to calculate the average atomic mass of the isotopes of an element
What is answers will vary?
300
This neutral atom has 33 electrons
What is arsenic?
300
Definition of mass number
What is the number of protons plus neutrons in an atom of an element?
300
This philosopher was among the first to postulate the existence of atoms
Who is Democritus?
300
Element with atomic number 17 and 20 neutrons
What is Chlorine-37?
300
This is the most abundant isotope of phosphorus in nature
What is P-31?
400
This element has 16 neutrons and a mass number of 32 amu
What is Sulfur?
400
Mass number of atom with 36 protons and 48 neutrons
What is 84 amu?
400
This scientist confirmed the existence of the neutron
Who is James Chadwick?
400
Definition of an isotope
What are atoms of the same element that have different mass numbers or different numbers of neutrons?
400
Uranium has three common isotopes. The abundance of U-234 is 0.01%, U-235 is 0.71%, U-238 is 99.28%,
what is the average atomic mass of uranium?
What is 237.98 amu?
500
Atomic number of the isotope Carbon-14
What is 6?
500
Element and mass number of a neutral atom with 30 electrons and 35 neutrons
What is Zinc-65?
500
Summarize Dalton's atomic theory
What are answers will vary?
500
Element with 79 protons and 121 neutrons
What is Gold?
500
Two isotopes of copper occur naturally; Cu-63 and Cu-65. The Cu-63 atoms have a mass of 62.929601 amu and the Cu-63 atoms have a mass of 64.927794 amu. What is the percent natural abundance for each isotope?