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asambeis [7]
3 years ago
5

Who made the periodic table?

Chemistry
2 answers:
swat323 years ago
7 0
Nobody specifically made the periodic table but it was first thought of by Dmitri Mendeleev in 1869.
DENIUS [597]3 years ago
6 0
Dmitri Mendeleev invented the periodic table.
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The first step in the formation of all three products is the loss of the ots leaving group to give a carbocation intermediate. t
lina2011 [118]

The carbocation stabilized by resonance structure and thereby lowers the energy of the carbocation, hydrogen will add to the carbon in the double bond that produces delocalization of electrons.

<h3>What is carbocation?</h3>

A carbocation is a molecule in which a carbon atom has a positive charge and three bonds.

In general, electrons are stabilized by delocalization. The stabilization energy engendered by delocalization over more than two atoms is called the resonance stabilization energy or simply the resonance energy. The greater the extent of electron delocalization the greater the resonance stabilization.

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2 years ago
How does a change in the temperature of the boiling point indicate that a chemical reaction has occurred?
Elodia [21]

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A change in temperature is characteristic of a chemical change. ... If temperature increases, as it does in most reactions, a chemical change is likely to be occurring. This is different from the physical temperature change. During a physical temperature change, one substance, such as water is being heated.

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3 years ago
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Answer:

A

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How many protons, electrons, and neutrons does the following isotope contain? 79Br+
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The number of protons = atomic number in Periodic table, so 35

The number of neutrons = mass number - number of protons = 79-35=44

The number of electrons = atomic number - 1 = 35-1 =34

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