Answer:
900
Explanation:
when you add/subtract you round to the least number of decimals points
Answer:
A) The energy of a given orbital increases as the nuclear charge Z increases.
Explanation:
The energy of an orbital is as higher as the attraction force between protons and electrons is lower. So, as far as from nuclei, the orbital is more energetic. When Z increases, that means that the number of protons increases, so the attraction force increases, then the energy of a given orbital decrease.
Letter "b" is correct because of the Linus Pauling diagram in which the levels and sublevels are displaced to know its energy. The sublevel 3d is more energetic than the sublevel 4s, so it's necessary both quantum numbers.
Letter "c" is correct because the electrons at the same orbital have a greater repulsive force, so they can't shield electrons at the same orbital. But the inner electrons are attracted to the nuclei, so the repulsive force, plus the distance, will be less effective.
Letter "d" is correct because the penetration effect means the ability of an orbital to attract an electron. So, when the division in sublevels can explain that energy from the orbitals.
Letter "e" is correct because in the hydrogen atom there is only one orbital with one quantum number n and one quantum number l, which are n = 1, l = s, so the energy depends only on the quantum number n.
Given :
A gas with a volume of 2 L at 25°C is placed into a container that is 4 L.
To Find :
The new temperature of the gas.
Solution :
Since, their is no information regarding pressure. We will assume that pressure is constant.
Now, we know when at constant pressure, volume is directly proportional to volume.
Therefore, the new temperature of the gas is 596 - 273 K = 323 K.
Answer: Option (c) is the correct answer.
Explanation:
Thermal conductivity is defined as the ability of a substance to transfer heat.
Also, it is known that metals are good conductors of heat and electricity. Therefore, they show high thermal conductivity.
Whereas non-metals are bad conductors of heat and electricity. Hence, they have poor thermal conductivity. Therefore, antimony and carbon will have less thermal conductivity.
On the other hand, thermal conductivity value of sodium is 140 W/(m k) and gallium is 29 W/(m k).
Thus, we can conclude that out of the given options sodium element is likely to have the highest thermal conductivity.