Mg
......
Electron configuration:
²⁴₁₂Mg: 1s² 2s² 2p⁶ 3s²
>>> 3s² - valence shell with 2 valence electrons
True. light is particles. photons, however are waves.
Answer 6
Explanation: That means a carbon atom has 6 protons, 6 neutrons, and 6 electrons.
Answer: <u>Mixtures can be physically separated but pure substances cannot be physically separated.</u>
Explanation: Mixtures can be physically separated by using methods that use differences in physical properties to separate the components of the mixture, such as evaporation, distillation, filtration and chromatography. A pure substance, any compound or element, can't be separated into different atoms by physical methods. Pure substances are compounds and elements (made up of the same atom or same molecule respectively), while mixtures are an assortment of different substances put together. Hope this helps ^-^.
