Atomic Structure Flashcards
how are electrons arranged in atoms
electrons are arranged at different distances from the nucleus
where is most of the mass in an atom concentrated
most of the mass in an atom is concentrated In the nucleus
what are molecules
molecules are two or more atoms chemically combined
how is an atom made up
an atom has a positively charged nucleus which is orbited by negatively charged electrons
in what environment would the relative mass of an atom change
it doesn’t change, mass is conserved in all environments
is the nucleus or atom bigger
the atom is bigger as the nucleus is inside it
what are the 3 things atoms are made up of
Electrons
Neutrons
Protons
whats the relative mass
Number of Protons + Number of Neutrons
whats the relative mass of protons and neutrons
the relative mass of protons and neutrons are both 1
whats the relative mass of electrons
0.0005 (This gets rounded to zero)
where are protons found
protons are found in the nucleus
whats an elements atomic number equal to
an elements atomic number is the same as the number of protons
where are electrons found
electrons are found in fixed orbit around the nucleus
what does the total number of negative electrons equate to
the total number of negative electrons = the number of protons
whats the relative charge of a neutron
0 as It is neutral
