Atomic Structure

The subatomic particle that carries a negative charge is ...

The atomic number of an element states the number of ...

Consider the symbol ${}_{}^{}{}_{11}^{23}\mathrm{Na}$. The number of protons in that sodium atom is ...

A neutral atom with atomic number 8 has ... electrons.

The number of neutrons in ${}_{}^{}{}_8^{16}\mathrm{O}$ is ...

The subatomic particle that has no electric charge is ...

The atoms ${}_{}^{}{}_{17}^{35}\mathrm{Cl}$ and ${}_{}^{}{}_{17}^{37}\mathrm{Cl}$ are examples of ...

A $\mathrm{Ca}{}^{2+}$ ion with atomic number 20 and mass number 40 has ... electrons.

The electron configuration of a sodium atom $(Z=11)$ is ...

The number of neutrons in ${}_{}^{}{}_{26}^{56}\mathrm{Fe}$ is ...

Two atoms are called isotopes if ...

Which pair of atoms is isobaric?

An oxygen atom $(Z=8)$ has ... valence electrons.

An atom has mass number 27 and 14 neutrons. Its atomic number is ...

An $X^{3+}$ ion has 10 electrons. The atomic number of element X is ...

The sulfide ion $\mathrm{S}{}^{2-}$ with $Z=16$ has the electron configuration ...

The atom ${}_{}^{}{}_{16}^{32}\mathrm{S}$ and the ion ${}_{}^{}{}_{16}^{32}\mathrm{S}{}^{2-}$ share the same ...

Given the atom ${}_{}^{}{}_{15}^{31}\mathrm{P}$. The correct statement is ...

The pair ${}_{}^{}{}_7^{14}\mathrm{N}$ and ${}_{}^{}{}_8^{15}\mathrm{O}$ is an example of ...

Atom X has 12 protons and 12 neutrons, while atom Y has 12 protons and 13 neutrons. These two atoms ...