GES 105 - FINAL EXAM STUDY GUIDE
Question and answers already passed
2025/2026
Element - correct answer ✔any material that is made up of only one type of atom.
The periodic table list more than... - correct answer ✔100 elements
the most abundant element in the universe is... - correct answer ✔hydrogen
the origin of the elements is... - correct answer ✔the stars
whats known about atoms? - correct answer ✔they are perpetually moving, tinier than the
wavelengths of visible light, recycling among innumerable forms
atoms... - correct answer ✔are mostly empty space
atoms are made up of... - correct answer ✔positively charged protons, electrically neutral neutrons,
and negatively charged electrons
CO2 is carbon dioxide. One atoms of carbon and two atoms of oxygen. - correct answer ✔the symbol
Co us the element cobalt (atomic form)
the atomic number of an element matches - correct answer ✔the number of protons in the nucleus of
an atom.
, Noble or inert gasses are in group 18 (8a) of the periodic table and their atoms have similar chemical
properties. Those atoms have filled valence shells so they are - correct answer ✔unreactive - He (2
valence electrons) and the rest have 8 valence electrons (octet)
the radioactive decay of nature's elements occurs - correct answer ✔all around us
alpha radiation - correct answer ✔helium nucleus with 2+ charge, most ionizing, least penetrating
beta - correct answer ✔high speed electrons, negative charge moderate penetrability
gamma radiation - correct answer ✔non ionizing, no mass, highest penetrability
radon - correct answer ✔a gas at standard temperature and pressure.
when food is exposed to gamma radiation - correct answer ✔the food is safe to eat
a certain isotope has a half-life of one day. this means ... - correct answer ✔the amount of that isotope
remaining at the end of four days will be 1/16
when an element ejects an alpha particle - correct answer ✔the mass number of the resulting element
reduces by 4
attractions between molecules goes up... - correct answer ✔as temperature goes down.
max attraction is found in solids and gradually less attraction is found in liquids... - correct answer
✔than in gasses
Question and answers already passed
2025/2026
Element - correct answer ✔any material that is made up of only one type of atom.
The periodic table list more than... - correct answer ✔100 elements
the most abundant element in the universe is... - correct answer ✔hydrogen
the origin of the elements is... - correct answer ✔the stars
whats known about atoms? - correct answer ✔they are perpetually moving, tinier than the
wavelengths of visible light, recycling among innumerable forms
atoms... - correct answer ✔are mostly empty space
atoms are made up of... - correct answer ✔positively charged protons, electrically neutral neutrons,
and negatively charged electrons
CO2 is carbon dioxide. One atoms of carbon and two atoms of oxygen. - correct answer ✔the symbol
Co us the element cobalt (atomic form)
the atomic number of an element matches - correct answer ✔the number of protons in the nucleus of
an atom.
, Noble or inert gasses are in group 18 (8a) of the periodic table and their atoms have similar chemical
properties. Those atoms have filled valence shells so they are - correct answer ✔unreactive - He (2
valence electrons) and the rest have 8 valence electrons (octet)
the radioactive decay of nature's elements occurs - correct answer ✔all around us
alpha radiation - correct answer ✔helium nucleus with 2+ charge, most ionizing, least penetrating
beta - correct answer ✔high speed electrons, negative charge moderate penetrability
gamma radiation - correct answer ✔non ionizing, no mass, highest penetrability
radon - correct answer ✔a gas at standard temperature and pressure.
when food is exposed to gamma radiation - correct answer ✔the food is safe to eat
a certain isotope has a half-life of one day. this means ... - correct answer ✔the amount of that isotope
remaining at the end of four days will be 1/16
when an element ejects an alpha particle - correct answer ✔the mass number of the resulting element
reduces by 4
attractions between molecules goes up... - correct answer ✔as temperature goes down.
max attraction is found in solids and gradually less attraction is found in liquids... - correct answer
✔than in gasses
