Scientists
This scientist is credited for coming up with the "plum pudding" model of the atom as a result of finding that atoms have negative charges (electrons) suspended in them via his cathode ray tube experiment.
Who is J.J. Thomson?
Here are three isotopes of an element:
126C 136C 146C
This element is ______.
What is carbon?
This is the atomic number for uranium-235.
What is 92?
Naturally occurring europium (Eu) consists of two isotopes was a mass of 151 and 153. Europium-151 has an abundance of 48.03% and Europium-153 has an abundance of 51.97%. This is the relative atomic mass of europium.
What is 152.0394 amu?
This type of nuclear decay releases a helium nucleus.
What is alpha decay?
This scientist is credited with the discovery of the proton via his gold foil experiment in which he shot alpha particles at a thin sheet of gold metal, as well as the fact that atoms are mostly empty space.
Who was Ernest Rutherford?
Here are three isotopes of an element:
126C 136C 146C
The number 6 refers to the ______ ______.
What is atomic number or number of protons?
This is the mass number for uranium-235.
What is 235?
Strontium consists of four isotopes with masses of 84 (abundance 0.50%), 86 (abundance of 9.9%), 87 (abundance of 7.0%), and 88 (abundance of 82.6%). Calculate the relative atomic mass of strontium.
What is 87.712 amu?
This particle is emitted during beta decay.
What is an electron or positron?
This scientist is credited with the discovery of the CHARGE of electrons via his oil drop experiment.
Who was Robert Millikan?
Here are three isotopes of an element:
126C 136C 146C
The numbers 12, 13, and 14 refer to the ____ ______.
What is mass number or atomic mass?
This is the number of protons for uranium-235.
What is 92?
An element has the following isotopic information. Use it to calculate the relative atomic mass.
Mass %
1 203.973 1.40
2 205.9745 24.10
3 206.9759 22.10
4 207.9766 52.40
What is 207.2169 amu?
Write the nuclear equation for the alpha decay of Uranium-238.
Hint: Show the change in atomic number and mass.
What is 23892U --> 42He + 23490Th?
This scientist was the one who brought the idea of atoms back into play via his solid sphere model.
Who was John Dalton?
Here are three isotopes of an element:
126C 136C 146C
How many protons and neutrons are in the first isotope?
What is 6 protons and 6 neutrons?
This is the number of neutrons for uranium-235.
What is 143?
DOUBLE JEOPARDY!!!!!!!
An element has the following isotopic information. Use it to identify the unknown element.
Mass %
1 203.973 1.40
2 205.9745 24.10
3 206.9759 22.10
4 207.9766 52.40
What is lead (Pb)?
A sample of iodine-131 has a half-life of 8 days. This is much remains after 24 days if you start with 100 g.
What is 12.5 g?
This scientist postulated that electrons orbit the nucleus much like planets orbit the sun.
Who was Neils Bohr?
Here are three isotopes of an element:
126C 136C 146C
How many protons and neutrons are in the second isotope?
What is 6 protons and 7 neutrons?
This is the number of electrons for uranium-235.
What is 92?
Calculate the average atomic mass for an element with the following isotopic information, and identify the element.
Atomic Mass % Abundance
1 12.0000 98.89%
2 13.0034 1.11%
What is 12.01 amu and carbon?
This type of radiation is most penetrating and requires lead shielding.
What is gamma radiation?