Nuclei
A species of atom having the same number of protons in its atomic nuclei.
What is an element?
The element with the most stable isotopes.
What is tin?
The largest stable element.
Note: Bismuth is slightly radioactive
What is Lead?
Name of the group of elements with 7 valence electrons.
What are the Halogens?
the spontaneous breakdown of an atomic nucleus resulting in the release of energy and matter from the nucleus.
What is radioactive decay?
The approximate mass of a proton or a neutron. (include the appropriate unit)
What is one atomic mass unit?
Elements in the same column of the periodic table have this in common.
What are the same number of valence electrons?
Three of these particles make up protons and neutrons.
What are quarks?
Reactive group of elements that all have one valence electron.
What are the alkali metals?
Find the mass of a radioactive isotope if 3 half lives occurred. The initial mass of the material was 80g.
What is 10g?
The main place in the Universe where nuclear fusion occurs.
What are stars?
The mass of an atom with 6 protons, 7 neutrons, and 6 electrons.
What is 13 amu?
Electrons in the outermost energy level of an atom.
What are valence electrons?
The two most common elements in the Universe.
What are Hydrogen and Helium?
The average number of particles in the nucleus of a Bromine atom.
What is 80?
Versions of an element with different numbers of neutrons.
What are isotopes?
The difference between Oxygen atoms with atomic masses of 15 and 16.
What is one neutron?
(Oxygen-15 has 7, Oxygen-16 has 8).
The number of electron energy levels Arsenic has.
What is four energy levels?
Reactive element found in its free form in Earth's atmosphere due to photosynthesis.
What is oxygen?
A zircon crystal is discovered in Australia containing 1.56% Uranium-235 (parent isotope) compared to 98.44% Lead-207 (daughter isotope). The half-life of U-235 is known to be 700 million years. How old is this crystal?
What is 4.2 billion years old?
What is 4,200 million years old?
What is 4,200,000,000 years old?
The number of neutrons in Uranium-238.
What is 146 neutrons?
238-92 = 146.
An atom that does not have the same amount of protons and electrons.
What is an ion?
Unreactive group in the periodic table with full outer shells of valence electrons.
What are noble gases?
The scientific discipline involved with elements and compounds composed of atoms, molecules and ions: their composition, structure, properties, behavior and the changes they undergo during a reaction with other substances.
What is Chemistry?
The age of a bone if 0.78% of the natural background level of Carbon-14 is remaining. The half-life of C-14 is 5,730 years.
What is 40,110 years old?