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 many grams of nacl are in 250 g of a 15.0% (by weight) solution?
Gelneren [198K]

Answer: -

37.5 g of NaCl are in 250 g of a 15.0% (by weight) solution.

Explanation: -

Total mass = 250 g

Percentage of NaCl = 15.0 %

= \frac{Number of grams of NaCl present}{total mass}

Thus \frac{15}{100} = \frac{Number of grams of NaCl present}{250g}

Number of grams of NaCl present = \frac{15 x 250g}{100}

= 37.5 g

4 0
3 years ago
What volume of hydrogen will be produced at STP by the reaction of 67.3 g of tin with excess water according to the following re
VikaD [51]

Answer:

Sn + 2H2O ==> Sn(OH)2 + 2H2

67.3 g Sn x 1 mol/119 g x 2 mol H2/mol Sn x 22.4 L/mole = answer in liters

Explanation:

Sn + 2H2O ==> Sn(OH)2 + 2H2

67.3 g Sn x 1 mol/119 g x 2 mol H2/mol Sn x 22.4 L/mole = answer in liters

5 0
3 years ago
Plz help I’ll mark brainliest
Neko [114]

Answer:

Industrialization has historically led to urbanization by creating economic growth and job opportunities that draw people to cities. Urbanization typically begins when a factory or multiple factories are established within a region, thus creating a high demand for factory labor.

4 0
2 years ago
Read 2 more answers
I2 is an example of a
Free_Kalibri [48]

Answer:

number

Explanation:

5 0
3 years ago
Read 2 more answers
HELPPPPP
AVprozaik [17]

A. electron, B. Nucleus

Proton is positive charge, electron is negative charge

proton weight, 1 AMU

4 0
3 years ago
Other questions:
  • Which property best indicates that a compound contains an ionic bond?
    12·1 answer
  • Plastic particles in the sea can cause problems to aquatic life ranging from plankton, fish to big animals like turtles, dolphin
    6·1 answer
  • plez hurry Which is an important safety precaution that should be taken during a tornado? Stay away from doors and windows. Move
    11·2 answers
  • The forensic technician at a crime scene has just prepared a luminol stock solution by adding 18.0 g of luminol to H2O creating
    12·1 answer
  • Will the final amount of biodiesel change if you actually have more or less amount of catalyst​
    7·1 answer
  • The product of a chemical reaction can never have a greater mass than the reactants true or false
    13·1 answer
  • What ingredients are needed to make GHB?
    15·1 answer
  • What is the balanced form of the equation C2H6 + O2→CO2+H2O?
    12·1 answer
  • 1. When an element has a positive charge :
    14·1 answer
  • Match the following scientist with his experiment or contribution
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!