Atomic Structure Study Guide Flash Cards
How many amu is a proton?
1 amu
How many amu is a neutron?
1 amu
What is the charge of a proton?
+1
What is the charge of a neutron?
0
What is the charge of an electron?
-1
Atomic number is the number of ________ an atom has.
protons
Mass number is the rounded number of ______ + ______ .
protons + neutrons
In a neutral atom, its number of protons equals its number of _____ .
electrons
In a neutral atom, its number of electrons equals its number of _____ .
protons
Name a complex sub-atomic particle.
Quark
True or False: Isotopes have the same physical but different chemical properties.
False! Isotopes have the SAME physical AND chemical properties. The only difference is the atoms mass.
True or False: Two isotopes can have a different number of protons.
False! Isotopes of an atom all have the same number of protons.
True or False: An atom and its ion have a different number of electrons.
True! When an atom gains or loses an electron, it becomes an ion.
Name four ways to identify a chemical reaction has occurred.
- Change in color
- Production of a gas
- Formation of a precipitate
- Production of heat/light
Define wavelength
The distance from the peak of one way to the peak of the next wave.
Define frequency
The number of waves that pass through a given area over a set of time.
Define what it means when an atom is in its ground state.
All of the atoms electrons are at their lowest energy.
Define what it means when an atom is in an excited state.
One (or more) electron absorbs energy and jumps to a higher orbital.
Is an atom stable when it’s in its ground state or excited state?
An atom is stable when it’s in its ground state.
When an electron loses extra energy it absorbed, giving the energy up as ______ or as _______ that can be seen in the ______ range.
When an electron loses extra energy it absorbed, giving the energy up as __(heat)__ or as __(waves)__ that can be seen in the __(visible light)__ range.
True or False: Isotopes are neutral?
True. The number of protons an isotope has must equal the number of electrons.
