Answer: Bohr proposed his quantized shell model of the atom to explain how electrons can have stable orbits around the nucleus.
so C would seems to be right.
Explanation: The energy of an electron depends on the size of the orbit and is lower for smaller orbits. Radiation can occur only when the electron jumps from one orbit to another. The atom will be completely stable in the state with the smallest orbit, since there is no orbit of lower energy into which the electron can jump.
It had to be a physical change unless there a chemical touching the metal surface making it a chemical change .
Answer:
A and B plz mark brainliest
Explanation:
Your answer would be C. Potential energy is when your withholding the action and are about to carry through with the action
Answer:
Group VII
Explanation:
The electronegativity of an element is the tendency of the atoms of that element to attract electrons that are shared with other atoms.
Each element has a different electronegativity from other elements. In particular:
- Electronegativity increases as we move towards the right along the periodic table - this is due to the fact that as we move to the right, the number of valence electrons in the atom increases, and therefore the tendency of the atom to attract more electrons increases more, in order to fill the valence shell. In fact, the most electronegative group is group VII, which is the last but on one on the right (the last group on the right, VIII, is the group containing the noble gases, which do not react at all, so they do not attract electrons)
- Electronegavity also decreases as we move downward along the periodic table - this is because as we move downward, the number of shells and electrons around the atom increase, so all these electrons "shield" the nucleus (which is positively charged, so it is the one attracting the electrons from other atoms), and so the tendency to attract more electrons decreases.
So, the group of element most electronegative is
VII