Journey Inside the Atom: common misconceptions

If your child says… “The positive charge is spread everywhere.”

Ask together

Could widely spread charge turn a few particles back so sharply?

What’s true

The rare sharp deflections showed that positive charge was concentrated in a tiny nucleus.

If your child says… “Electrons belong inside the nucleus.”

Ask together

Are the electron dots inside the nucleus or on the surrounding shells?

What’s true

Electrons occupy shells around the nucleus, outside it.

If your child says… “Electrons provide most of the mass.”

Ask together

Which particles have the larger relative masses in the table?

What’s true

Each proton or neutron is much heavier than an electron.

If your child says… “A neutral atom has no charged particles.”

Ask together

Does a zero total remove the eleven protons or eleven electrons?

What’s true

Each proton’s positive charge balances one electron’s negative charge.

If your child says… “Mass number counts electrons too.”

Ask together

If mass number counts only nuclear particles, why subtract electrons?

What’s true

Subtract the proton count from mass number to find the neutron count.

If your child says… “Eleven electrons means valency eleven.”

Ask together

How many electrons leave when the arrangement changes from 2,8,1 to 2,8?

What’s true

Valency here counts the electron lost.

If your child says… “Isotopes have different proton counts.”

Ask together

Which count changes across these nuclei: protons or neutrons?

What’s true

Proton count decides the element.

If your child says… “Isobars are atoms of the same element.”

Ask together

Do equal totals guarantee equal proton counts?

What’s true

Their proton counts differ.