An atom with an atomic number of 18 will have how many electrons in its innermost orbit

Estimate the molar mass of the gas that effuses at 1.6 times the effusion rate of carbon dioxide.

Citric acid has a ph between 1 and 3.  it is considered to be aa. weak acidb. weak basec. strong based. strong acid

Which is a characteristic of the electron sea model for metallic bonding? molecular orbitals overlap to produce bands. electrons flow easily between metal nuclei. electrons are in fixed positions in the orbitals. atomic nuclei are arranged in an irregular pattern.