Build an Atom pHet Knowledge Check

Front

The nucleus of an atom is made of

Back

protons and neutrons

Front

Value representing the number of protons in an element

Back

Atomic Number

Front

A charged atom

Back

Ion

Front

Which part of an atom is used to identify it?

Back

number of protons

Front

When you have an ion of an atom, O^-2 for example, what has changed in the atomic structure?

Back

Number of electrons

Front

When you have a negative ion of an atom, O^-2 for example, do you have a higher number of protons or electrons?

Back

Number of electrons

Front

Which of the following is correct?

Back

Protons are positive, electrons are negative, neutrons are neutral.

Front

Iodine-131: The -131 tells you the

Back

mass number

Front

What two subatomic particles must be equal for an atom to have no charge (neutral)?

Back

protons and electrons

Front

If an atom contains exactly three protons, then it's an atom of _____ (Options: lithium, gold, nitrogen, carbon)

Back

lithium