1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Leviafan [203]
3 years ago
14

Give the number of protons, neutrons and electrons in 99Tc

Chemistry
1 answer:
miss Akunina [59]3 years ago
5 0

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

You might be interested in
How is radiation different from conduction?
steposvetlana [31]

Answer:

<u>Radiation is the transfer of energy by waves, and conduction is the transfer of heat through contact with air.</u>

Explanation:

Conduction is the transfer of thermal energy through direct contact.  Radiation is the transfer of thermal energy through thermal emission.

7 0
3 years ago
Identify each definition that applies to the compound in red. Check all that apply.
andre [41]

Answer:

Arrhenius acid & Bronsted-Lowry acid

Explanation:

4 0
3 years ago
Gamma radiation is electromagnetic energy<br> True or false
AfilCa [17]

Hey there! :D

This is a true statement. Gamma radiation comes from electromagnetic energy from radioactive decay. This decay has the shortest electromagnetic wave lengths and therefore has the highest photon energy. It is extremely dangerous. Radiation in general is something to be cautious of!

I hope this helps!

~kaikers

5 0
3 years ago
Read 2 more answers
Libby is doing experiments with two different magnets. Magnet A can only attract thumbtacks that are up to 1 inch away from it.
castortr0y [4]

magnet B has a greater magnetic pull than magnet A

6 0
3 years ago
What is the molality of a 13.82% by mass glucose solution? the molar mass of c6h12o6 is 180.16 g/mol?
FrozenT [24]
13.82 g / 180.16 g/mol = .07671 moles
.07671 moles / (86.18 g / 1000 g/kg) = .8901 molal

Let me know if you have any further questions!

5 0
3 years ago
Read 2 more answers
Other questions:
  • What type of matter would vaporization and condensation fall under? Solid Liquid or gas?
    13·1 answer
  • Which of the following classes of organic compounds has C=C in it?
    7·1 answer
  • What's the meaning of pH indicator?
    14·2 answers
  • 13. Fe + Cu(NO3)2 -&gt; Fe(NO3)2 + Cu<br> Is what type of reaction
    9·1 answer
  • According to the big bang theory, the universe—all of the stars, planets, and galaxies everywhere—began as a very small, dense m
    14·1 answer
  • How did the naacp use a legal strategy to oppose segregation?
    13·1 answer
  • Two separate masses of zinc were measured on a laboratory balance. The first zinc had a sample mass of 210.10g, and the second z
    12·1 answer
  • 400 liters of a certain gas is collected at STP. What will the volume be at 273 C and 190 torr pressure?
    11·1 answer
  • What is the difference between an element and a compound? (p.s. it due in 5 mins ASAP so hurry.)
    5·1 answer
  • A 29.4 ml sample of 0.347 m triethylamine, (c2h5)3n, is titrated with 0.375 m hydrobromic acid. at the equivalence point, the ph
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!