Atom structure and the periodic table Flashcards
(25 cards)
Name all the parts of an atom
- Neucleus
- Shell
- Protons
- Electron
- Neutron
An atom has a radius of around ….
o.1nm
An atom is measured from the ….to the ….
neucleus…. outer electron orbit
atomic no. + atomic no. =
no.of protons and electrons
atoms can ….. or …. electrons
gain…lose
describe the neucleus
what it consist of
the neucleus is the center of an atom consisting of protons and neutrons
electrons have a …. charge
negative -
Li in lithium represents the ….
elemental symbol
mass no. - atomic no. =
no. of neutrons
neutrons have a …. charge
neutral =
protons have a …..charge
positive +
the ring which the electron orbits is called a …
shell
what does the mass number tell you
the amount of protons and neutrons
what is the atomic number
how many protons
what tells you the number of protons and neutrons
mass number
the number of ….. and …. are always the same
protons …… electrons
what is the relative mass of
* protons
* neutrons
* electrons
- 1
- 1
- 0
what is an ion
an ion is an atom that as gained or lost electrons
an atom with equal protons and electrons is called …..
a neutral atom
an atom with more electrons than protons is called …..
a negative ion
an atom that has more protons than electrons is called ….
positive ion
what is an isotope
different forms of the same element but a different amount of neutrons
what is a way to identify an atom
by the number of protons it has
what in an element never change
the number of protons
