Well, nonmetals have more filled shells, making it harder to remove electrons, AND n<span>onmetals have smaller atoms, while metals have larger atoms and therefore less attraction of the electrons to the nucleus. The nuclear charge increases from left to right across a period and the shielding effect stays the same. So it is more difficult to remove an electron from a nonmetal than an alkali metal. ;3</span>
Answer:
The mass of water = 97.28g
The molecular mass of water is
18.01528 g/mol
No of moles of water is 97.28/18.01528 = 5.3998
Approximately 5
Therefore, there are 5 molecules of water in 97.28g of water.
Wavelength decreases as frequency increases.
Imagine a heart rate graph. As the heart beats faster, frequency increases and the time between heartbeats decreases (wavelength).
Make sense that way?
The mineral is calcite.
Lustre — glassy; ∴ non-metallic
Hardness — between a fingernail (2.5) and a penny (3)
Streak — white
Specific gravity — 54/20 = 2.7
Colour —white
Acid reaction — Fizzes; ∴ a carbonate
The only carbonate mineral that satisfies all these criteria is calcite, CaCO₃.
I think it's coal as you use it for bbqs and train drivers use coal too. I'm pretty sure it's coal, but I'm not 100% sure. Hoped this helps.