Elements in the same group are most similar.
For example hafnium-zirconium and niobium-tantal.
Elements in the same group tend to have similar properties.
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Calcium and potassium
Hydrogenium. It has one electron, so that one is in his own direction. in the other elements they pair up. one electrone,
A compound is defined as a substance that contains at least two chemical elements and always has a constant mass ratio between elements for each possible pair of the elements that are present in it.
the most common is granite and rhyolite
The question is incomplete. No options are given (for which of the following) to answer the question.
Calcium and potassium
Neon and argon because they are both noble gases.
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Caesium and Xenon, with 36 isotopes each
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Try create a logical sentence using the question pair. Try to implement the same for the following answer options. Choose the option that is most similar to the question pair.
No, because that's impossible unless you planed on doing that and if you did that will b called cheating.
Two fathers who live in the same neighborhood
There is no fully objective answer to this question. Many chemists would consider that two lanthanide elements with atomic numbers differing by only one would be likely to qualify. Another possibility is the pair zirconium and hafnium. These are very similar in most chemical characteristics but differ greatly in electron capture tendencies in nuclear reactors.
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Hydrogenium. It has one electron, so that one is in his own direction. in the other elements they pair up. one electrone,