Answer:
The concentration of hydroxide ions in a 3.5 is
C. 10.5
Hey there,
The answer is Group 1 elements.
Hope this helps :))
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Answer:
If the frequency is doubled, the wavelength is only half as long.
Explanation:
Wave speed equals frequency*wavelength. So doubling the frequency must halve the wavelength in order for wave speed to remain the same.
From the periodic table, beryllium has an atomic number 4. This means that beryllium has 4 electrons.
Now, the first energy level can hold only 2 electrons (which will occupy the s sublevel) wile the remaining two electrons will occupy the second energy level (also in the s sublevel).
Based on the above, the electronic configuration of beryllium will be as follows:
1s2 2s2
