What is the number of protons in an atom with the electron configuration of 2−5?*

In the wave-mechanical model of an atom, an orbital is defined as*

In the ground state, which shell of a potassium atom has an electron with the greatest amount of energy?*

Which phrase describes two atoms that contain the same number of protons but a different number of neutrons?*

All atoms of an element have the same*

Which Group 15 element is classified as a metal?*

Compared to the number of electron shells and radius of an aluminum atom in the ground state, a boron atom in the ground state has*

Hydrogen sulfide, H₂S, is classified as a*

A structural formula differs from a molecular formula in that a structural formula shows the*

Which type of reaction occurs when a compound is separated into its elements?*

Which terms represent two categories of compounds?*

When an atom of hydrogen and an atom of chlorine combine to form a molecule of hydrogen chloride, a bond is*

All atoms of the element vanadium must have the same*

Which sample of matter can be separated into two different substances by physical means?*

Two liquids can be separated by distillation due to a difference in*