7.1 Language of the Atom Flashcards
What is another name for proton number?
atomic number
What is a proton/atomic number?
It denotes the number of protons in the nucleus of an atom.
What does a proton/atomic number define?
The element, no 2 elements can have the same number of protons.
In a neutral atom what does the proton/atomic number also represent?
The amount of electrons in atom
What is the neutron number?
The number of neutrons in the nucleus of an atom.
What is another name for the mass number?
The nucleon number
What are the nucleons?
protons and neutrons
What is the mass/nucleon number?
The sum of protons and neutrons in the nucleus of an atom.
What is the mass of a proton?
1.67x10^-27
What is the mass of an electron?
9.1x10^-31
What symbol is usually used to represent proton/atomic number?
z
What symbol is usually used to represent mass/nucleon number?
A
What symbol is usually used to represent the neutron number?
N
In the standard notation of an element where is the proton/atomic number found?
Bottom left corner of element symbol
In the standard notation of an element where is the mass/nucleon number found?
Top left corner of element symbol
What are nuclides?
isotopes
What is an isotope?
A version of an element with the same atomic/proton number, but a different neutron number and hence mass number than original.
Can unstable isotops decay to stable ones?
Yes
What radiation is emitted during decay of isotopes?
alpha
beta
gamma
What do decay of isotopes follow? time wise
the idea of half life
