Answer ALL questions. Look for any feedback given if you get an answer incorrect. Keep choosing an answer until you get it correct. CORRECT or INCORRECT answers are indicated at the TOP of the page. A score is given at the TOP of the page when the exercise has been completed.
what proportion of protons to electrons do all atoms have ?
no electrons in an atom
equal protons and electrons
more electrons than protons
more protons than electrons
what is the nucleus of an atom made up of ?
neutrinos
protons
electrons
molecules
what do we call substances that have molecules that are densely packed ?
metals
solids
liquids
gases
which part of an atom is responsible for the flow of electric current?
proton
neutron
electron
positron
what do we call substances that have molecules that are almost unrestricted in movement ?
gases
solids
liquids
metals
what do we call substances that have molecules that are not densely packed together - but are able to move about?
solids
liquids
gases
metals
what charge does an electron have ?
positive
negative
neutral
alternating
what charge does a proton have ?
positive
negative
neutral
alternating
current is described by the movement of free ..............s from one atom to another along the molecular structure of the conductor. What is the missing word ?
protons
neutrons
electrons
higgs-bosun particles
what charge does a neutron have ?
positive
negative
neutral
alternating
Where is a neutron found ?
in the atomic nucleus
orbiting the nucleus
joined to the electrons
between the atomic nucleus and the orbits
Where is a proton found ?
in the atomic nucleus
orbiting the nucleus
joined to the electrons
between the atomic nucleus and the orbits
Where is an electron found ?
in the atomic nucleus
orbiting the nucleus
joined to the electrons
between the atomic nucleus and the orbits
What is indicated by the letter 'A' here ?
proton
neutron
shell
electron
What is indicated by the letter 'B' here ?
proton
neutron
shell
electron
What is indicated by the letter 'C' here ?
proton
neutron
shell
electron
What is indicated by the letter 'D' here ?
proton
neutron
shell
electron
From what element does the atom shown here belong. To see the periodic table..Click here