Answer:
Last option is the correct choice.
Explanation:
Number of protons = 60-33 = 27
Superscript 60 Subscript 27 upper C o.
Best Regards!
Density = Mass / Volume
Density = 2.74g / 3.10cm³
Density = 0.88 g/cm³
Answer: Option (b) is the correct answer.
Explanation:
To find molarity, firstly we need to calculate number of moles as follows.
No. of moles = ![\frac{mass given}{molar mass}](https://tex.z-dn.net/?f=%5Cfrac%7Bmass%20given%7D%7Bmolar%20mass%7D)
= ![\frac{5.00 g}{39.9969 g/mol}](https://tex.z-dn.net/?f=%5Cfrac%7B5.00%20g%7D%7B39.9969%20g%2Fmol%7D)
= ![0.125 mol](https://tex.z-dn.net/?f=0.125%20mol)
Therefore, molratity is defines as number of moles of solute present in liter of solution.
Molarity = ![\frac{no. of moles of solute}{Volume of solution}](https://tex.z-dn.net/?f=%5Cfrac%7Bno.%20of%20moles%20of%20solute%7D%7BVolume%20of%20solution%7D)
= ![\frac{0.125 mol}{0.75 L}](https://tex.z-dn.net/?f=%5Cfrac%7B0.125%20mol%7D%7B0.75%20L%7D)
= ![0.167 mol L^{-1}](https://tex.z-dn.net/?f=0.167%20mol%20L%5E%7B-1%7D)
Thus, we can conclude that molarity of solution is
.
Answer:
Most common oxidation state of the chalcogens is -2, most common oxidation state of the halogens is -1.
Explanation:
For atomic radii, the chalcogens have a larger atomic radii than the halogens
This is because atomic radii decreases across the period due to increase in nuclear charge.
For ionic radii the chalcogens also have larger ionic radii than the halogens. This is because the chalcogens always carry a -2 charge compared to halogens that carry a -1 charge. Since -2 is the most common oxidation state for chalcogens and -1 is the most common oxidation state for the halogens.
In terms of oxidation states, the halogens show a higher value of common oxidation state -1 while for chalcogens is -2 even though +2, +4 and +6 oxidation states are also well known.
First ionization energy of halogens is greater than that of the chalcogens due to greater effective nuclear charge.
The second ionization energy of chalcogens is greater than that of the halogens.
Answer:
Independent Variables
Explanation:
These are changes that are made by the experimenter. They are factors that one is able to manipulate or control their values.