andreastyles1603
21.04.2020 •
Physics
The following sketch represents a sound wave played at a frequency of 440 Hz. Determine the speed of the sound
wave.
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Ответ:
For neutral atoms, the number of valence electrons is equal to the atom's main group number. The main group number for an element can be found from its column on the periodic table. For example, carbon is in group 4 and has 4 valence electrons. Oxygen is in group 6 and has 6 valence electrons.