Answer:-
Explanations:- Atomic number of Se is 34 and it forms after accepting two electrons and there becomes total 36 electrons to it.
Atomic number of Sr is 38 and it forms on losing two electrons from it's valence shell and there also becomes total 36 electrons to it.
Now, both of these are isoelectronic means having with equal number of electrons but the cation(positively charged ion) has more protons as compared to the anion(negatively charged ion) and because of this it has more effective nuclear charge and it's size is smaller.
The anion has less effective nuclear charge and so it's size is bigger.
Hence, the right choice is .
Molecules of elements
Explanation:
The balls that looks alike showing atoms of the same type shows molecules of elements.
Molecules of elements are those produced from pure substances whose atoms are the same.
They are called homonuclear molecules.
They are homonuclear in that they are made up of the same atom. These molecules of zero electronegativity differences between them.
They are non-polar.
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Covalent bonds brainly.com/question/5258547
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Answer: THe anwser for the first one is Carbon monoxide, Cupric selenide, iron or sulfide, lead dioxide
Explanation: i took these in science ur welcome
Answer:
yes
Explanation:
it is important for electrolysis