WorksheetsBuild an Atom pHet Knowledge Check
Total questions: 17
Worksheet time: 22mins
Which part of an atom is used to identify it?
number of protons
number of neutrons
number of electrons
When you have an ion of an atom, O-2 for example, what has changed in the atomic structure?
Number of protons
Number of neutrons
Number of electrons
When you have a negative ion of an atom, O-2 for example, do you have a higher number of protons or electrons?
Number of protons
Number of electrons
Which of the following is correct?
Protons are positive, electrons are negative, neutrons are neutral.
Protons are neutral, electrons are negative, neutrons are positive
Protons are negative, electrons are positive, neutrons are neutral
Protons are positive, electrons are neutral, neutrons are negative
Iodine-131
The -131 tells you the
number of protons.
mass number
charge of the atom.
What two subatomic particles must be equal for an atom to have no charge (neutral).
protons and neutrons
protons and electrons
electrons and neutrons
An ion is a charged atom. A negative ion has ____________electrons and a positive ion has ___________electrons.
lost, lost
lost, gained
gained, lost
gained, gained
Isotopes of the same element have the same number of ______________ but a different number of ______________. Write your answer in all lowercase and check spelling!
(a)
What do these isotopes of carbon all have in common? Click on the image for a bigger, clearer view.
neutrons & mass number
atomic number and neutrons
atomic number and electrons
protons, atomic number, and mass number
