atomic structure Flashcards
what are the 3 subatomic particles?
-proton
-neutron
-electron
which subatomic particle is positive
protons
are electrons positive, negative or neutral?
negative
which subatomic particle is neutral
neutron
what is the relative charge of an electron?
-1
what is the relative charge of a neutron
0
which subatomic particle has the relative charge of +1?
proton
what is the relative mass of a neutron
1
what is the relative mass of an electron?
very small
what is the relative mass of a proton
1
where in the atom are protons and neutrons found?
in the nucleus
fill the blank:
electrons _____ the nucleus
orbit
what is the overall charge of an atom? Why?
Neutral because the number of positive protons is equal to the number of negative electrons
What’s the atomic number?
The number of protons
(Same as the number of electrons)
What’s the mass number?
The number of protons and neutrons in total
what is an isotope?
An atom of the same element that has different numbers of neutrons
what is the name for the shells that electrons are arranged in?
Energy levels
What’s the maximum of electrons that the lowest energy level can hold
Two
What’s the maximum amount of electrons the second energy level can hold?
eight
What’s the maximum amount of electrons the third energy level can hold?
eight
Which energy level does electrons occupy first?
The lowest available
what is the electronic configuration for sodium which has 11 electrons?
2, 8, 1
