Worksheetsthe atom
Total questions: 7
Worksheet time: 4mins
nucleon
a general term describing both protons and neutrons
a negatively charged particle with a mass of about 1/1836 that of a proton
the basic structure of all matter consisting of a nucleus surrounded by electrons
atoms of the same element (i.e. they have the same number of protons) but with different numbers of neutrons.
Use your Periodic Table to identify the element with a proton number of 11
calcium
boron
magnesium
sodium
using your Periodic Table find the element that contains 20 neutrons
neon
aluminium
calcium
Lithium
isotopes are atoms of an element that have:
the same number of protons
the same number of electrons
a different number of neutrons
the same chemical symbol
most of the mass of an atom is contained in
the electron shells surrounding the nucleus
within the nucleus
spread throughout the atom
in the protons
forces within the nucleus that attract are:
gravity
strong nuclear force
weak nuclear force
electromagnetic force
why is it hard to measure the diameter of an atom?
Because it is dense
it is difficult to know where the boundary of the atom is
the boundary of the atom depends on many factors
because the nucleus has a much smaller diameter.
