Find the molar mass for NaNO3
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Ответ:
Molar mass
= Atomic mass of Na + Atomic mass of N + Atomic mass of O3
= 23 + 14 + (16×3)
= 23 + 14 + 48
= 85 g per mole
Ответ:
Answer is: Positively charged protons in the nucleus of the gold atom.
This was famous Rutherford's Gold Foil Experiment: he bombarded thin foil of gold with positive alpha particles (helium atom particles, consist of two protons and two neutrons).
Rutherford observed the deflection of alpha particles on the photographic film and notice that most of alpha particles passed straight through foil.
Rutherford theorized that atoms have their charge concentrated in a very small nucleus.