Third choice because the others make no sense
Answer:
Helium
Explanation: The real gas that acts most like an ideal gas is helium. This is because helium, unlike most gases, exists as a single atom, which makes the van der Waals dispersion forces as low as possible. Another factor is that helium, like other noble gases, has a completely filled outer electron shell.
Answer:
Explanation:
1 : apple sliced : the apple was cut into smaller peices : physical change
2 : smashed apple : the apple became a mush : physical change
3 : paper burned : the paper became ash : chemical change
4 : glow stick snapped : the glow stick started glowing : chemical change
5 : apple being burned : the apple became discoloured and turned coal-like : chemical change
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2. it does not alter the chemical make up of the apple
3. because it changes to a new substance entirely, changing the chemical make up of the paper to make it something new
4. smashing the apple, because you mash up the apple with your teeth in your mouth
5. The apple being burned is being chemically broken down to form a new substance, the same way your stomach digests food to break down and use for other reasons.
Lets take one element from Group 6A, Let it be oxygen, The electronic configuration of Oxygen is as follow,
O = 8 = 1s², 2s², 2px², 2py¹, 2px¹
There are 6 electrons in the valence shell of elements present in Group 6A. The unpaired electrons in 2px and 2py are involved in forming covalent bond, while the pair of electrons in 2s and 2px are unshared and act as lone pair of electrons.
Result:
There are TWO unpaired electrons present in the ground state of Group 6A elements.
Yes, because if it has a different number of neutrons, it could just be a specific type of isotope