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Ber [7]
3 years ago
7

Rows on the period table are called ______While columns are called_____.

Chemistry
1 answer:
oksano4ka [1.4K]3 years ago
5 0

Answer:

The rows running from left to right are called Periods and the columns going up and down are called Groups.

Explanation:

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777dan777 [17]

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c

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3 years ago
Give the number of protons, neutrons and electrons in 99Tc
miss Akunina [59]

Explanation:

Tc - 99 is technetium 99.

It is a radioactive element that decays spontaneously. It has a half-life of 211,000 years and decays to stable ruthenium.

  • On the periodic table, it has an atomic number of 43;

Mass number  = 99

Atomic number = number of protons = number of electrons in atom

  Number of protons in Tc is 43

                      electron is 43

Mass number = number of protons + number of neutrons

  Number of neutrons = mass number - number of protons = 99-43 = 56

learn more:

Atomic number brainly.com/question/2057656

#learnwithBrainly

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3 years ago
Calculate the volume of a 0.225M solution of KOH required to react with 0.215g of acetic acid.
Sidana [21]
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7 0
2 years ago
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Contact [7]
What’s the question lol
8 0
2 years ago
Given the reaction:
WARRIOR [948]

Answer:

4 moles

Explanation:

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6 0
2 years ago
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