Electron Configuration

What atom matches this electron configuration?
1s² 2s² 2p⁶ 3s²
Options: Neon, Magnesium, Aluminum, Potassium

Electron configuration for an oxygen atom? Options: 1s²2s²2p⁶3s²3p⁶4s², 1s²2s²2p⁴, 1s²2s²2p⁶, 1s²2s²2p⁶3s²3p⁶

What is the maximum number of electrons that an orbital can have? Options: 1 electron, 2 electrons, 3 electrons, 4 electrons

How many valence electrons are represented here? Options: 7, 5, 2, 8

How many d orbitals are there in a given sublevel? Options: 1, 3, 5, 7

How many p orbitals are there in a sublevel?

How many electrons can the d sublevel hold?

What is this element? 1s²2s²2p⁶3s²3p⁶4s²3d¹⁰4p⁶

What atom matches this electron configuration?
[Xe] 6s² 4f¹⁴ 5d⁹
Options: Mercury, Gold, Platinum, Thallium

What is the shorthand electron configuration for Sulfur atom? Options: [Ar] 3p⁴, [He] 3s²3p⁴, [Ne] 3s²3p⁴, [Na] 3s²3p³