Chemical changes occur when a substance combines with another to form a new substance, called synthesis or, alternatively, decomposes into two or more different substances.
Answer:
B) Although this site is not desirable for making a bond between atoms, it is a good site in the sense that the electrons can be close to the nucleus.
Explanation:
An antibonding orbital points away from the nuclei, with a node between them, so the electrons are not held close to the nuclei. The orbital is not desirable for bonding.
The diagram below shows a σ*1s molecular orbital, but a σ*2s orbital has a similar shape.
A) is true. The σ*1s orbital has the lowest energy.
C) is true. Any orbital can accommodate at most one electron pair.
D) is may be true. Orbital energy decreases as atomic number increases, so the orbital energy of an N₂ σ*2s molecule may be close to that of a sulfur atom's 2s orbital.
Answer:
Did you just let your cat walk on your keyboard? XD
Could you explain this a bit better please?
I'll answer the question in the replies of this comment if you can give me a bit more information.
Explanation:
May I have brainliest please? :)
Answer: 207.24
Explanation: Atomic mass = no of protons + no of neutrons
1) 82 protons, 122 neutrons , mass number= 82+122 = 204
2) 82 protons, 125 neutrons, mass number= 82+125 = 207
3) 82 protons, 124 neutrons, mass number= 82+124 = 206
4) 82 protons, 126 neutrons, mass number= 82+126 = 208
Average atomic mass of an element = 
Average atomic mass of given element = 
The approximate atomic mass of lead is 207.24.