Chazal tells us (Midrash Rabbah Bereishis 64:4 and 95:3; Yoma 28b, based on. Gen. 26:5; Kiddushin 82a) that the Patriarchs observed the mitzvahs before they were given. But Avraham did not circumcize himself or his male household members until specifically commanded. Why did he wait?
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periodic trends - Comparing radii in lithium, beryllium, magnesium, aluminium and sodium ions
Apparently the of last four, $\ce{Mg^2+}$ is closest in radius to $\ce{Li+}$. Is this true, and if so, why would a whole larger shell ($\ce{...
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I'm trying to translate somebody's tweet, and I'm just blocking on this one bit. I understand every part ("単行本", ...
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According to the values of boiling points that I found on internet the order is as follows: $\ce{H2O}$ > $\ce{HF}$ > $\ce{NH3}$ I was ...
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It is a well known fact that freezing point decreases on adding impurities. I feel that it should increase on adding impurities. Reason: I h...
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I am a confused (and somewhat anal retentive) non-chemist who is trying to understand what pH is. I have come to understand it is a measure ...
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