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zvonat [6]
3 years ago
5

The table to the right lists three characteristics of an atom of an element.

Chemistry
1 answer:
DerKrebs [107]3 years ago
6 0

Answer:

Rubidium

Explanation:

Rubidium is an alkali metal that has 37  protons 48 neutrons and 1 valence electron

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atomic mass = 59.015 amu * 0.717 + 62.011 amu * (1 – 0.717)

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Limestone stalactites and stalagmites are formed in caves by the following reaction: Ca2 (aq) 2HCO−3(aq)→CaCO3(s) CO2(g) H2O(l)
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Answer : The value of \Delta E for this reaction is 36.18 kJ

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\Delta E=q+w

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