4. Atoms and Elements

An atom has $82$ protons, $86$ electrons, and $125$ neutrons. Which element is it?

In the context of subatomic particles, how many protons are in one atom of carbon (C)?

In a simplified model of the atom, which subatomic particles are considered the heavy particles (i.e., account for nearly all of the atom’s mass)?

In a simplified model of the atom, where is a proton located?

In the simplified model of subatomic particles, what do an electron and a neutron have in common?

Which statement is true about a proton and an electron?

In a simplified model of the atom, which subatomic particle has a positive charge?

A neutral atom of tellurium (Te) has atomic number 52. How many protons are in one Te atom?

Which subatomic particle, when its number in the nucleus changes, changes an atom’s elemental identity?

Which element has an atomic number of $11$ (i.e., contains $11$ protons in its nucleus)?

Which subatomic particles in an atom carry a negative charge?

Which set correctly lists the three main subatomic particles that make up an atom?

In a neutral atom, which subatomic particle carries a negative charge?

Which subatomic particles in an atom carry a positive charge?

In a simplified model of the atom, which subatomic particle is typically considered the smallest?