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
Burka [1]
3 years ago
10

Consider the following isotopic symbol: 137Ba2+

Chemistry
1 answer:
aliya0001 [1]3 years ago
3 0

Answer:

a) 56 protons

b) 54 electrons

c) 81 neutrons

d) The sum of protons and neutrons is shown. The number of protons is always the same. So we can calculate the number of neutrons ( and also the isotopes)

e)137Ba (with 56 protons and 81 neutrons)

f) atomic mass is 136.9 u ; the mass number is the sum of protons and neutrons and is 137

Explanation:

Step 1: Data given

137 Ba2+ is an isotope of barium. The atomic number of barium( and its isotopes) is 56. This shows the number of protons.

For a neutral atom, the number of protons is equal to the number of electrons.

The different isotopes of an element have the same number of protons but a different number of neutrons.

137Ba2+ has 56 protons (this is the same as the atomic number)

137Ba2+ has 54 electrons ( since it's Ba2+, this means it has 2 electrons less than protons, that's why it's charged +2)

137Ba2+ has 81 neutrons ( 137 - 56 = 81)

In the symbol, the atomic number is not shown. The sum of the protons and neutrons is shown. (Since the number of protons is the same for every isotope, we can calculate the number of neutrons that way. By knowing the neutrons, we also know the isotope.

This isotope is 137Ba

Atomic mass is also known as atomic weight. The atomic mass is the weighted average mass of an atom of an element based on the relative natural abundance of that element's isotopes.

The atomic mass of 137Ba2+ is 136.9 u

The mass number is a count of the total number of protons and neutrons in an atom's nucleus.

The mass number of 137Ba2+ is 137

You might be interested in
What are all the ways that you think knowing about the flow of energy might be useful in
Kaylis [27]

Yes the main benifit can be recyclation of energy

  • The example can be seen in powerbanks or inverters
  • The chemical energy present inside the battery can be used to convert itself into electric energy.
  • Which can help us in climate protection
4 0
2 years ago
How many electrons would be exchanged from lithium and fluorine
Vikki [24]
Fluorine - Seven electrons of it's own. 

Lithium would give up one electron, so there for, fluorine is then left with eight.
3 0
3 years ago
Which of the following black body curves is representative of stars like our sun?
Bumek [7]
The answer is B
I also did this quiz.
7 0
2 years ago
Calcium has an atomic number of 20. An atom of calcium has ____ electrons in its first energy level and ____ electrons in its se
kotykmax [81]
Hug baby bye love you love love miss love bye bye love bye girl bye love bye baby love you love love bye bye baby bye bye girl love love miss love love you bye love love miss bye bye baby bye girl baby uuuuy bye baby girl baby baby love you love bye love love bye baby bye love love bye love love miss bye love you bye bye love love bye baby bye girl love love bye bye love love miss 574366 5)?676)$76664)456
4 0
2 years ago
How many grams of N2 gas are present in 1.13 L of gas at 2.09 atm and 291 K?
solong [7]

Answer:

Mass= 2.77g

Explanation:

Applying

P=2.09atm, V= 1.13L, R= 0.082, T= 291K, Mm of N2= 28

PV=nRT

NB

Moles(n) = m/M

PV=m/M×RT

m= PVM/RT

Substitute and Simplify

m= (2.09×1.13×28)/(0.082×291)

m= 2.77g

6 0
3 years ago
Other questions:
  • Acid-catalyzed dehydration of secondary and tertiary alcohols proceeds through an E1 mechanism. The first step is the protonatio
    14·1 answer
  • The final volume of the solution is 284 mL. What is the concentration of CuSO4 in the final solution, in mol/L?
    15·1 answer
  • Determine whether each of the following is exothermic or endothermic and indicate the sign of ΔH.
    10·1 answer
  • 1. Write chemical reaction of burning of magnesium
    10·1 answer
  • Which of the following representations shows how one variable changes in response to another variable?
    15·2 answers
  • 44.2124+0.81+7.335 significant digits
    13·1 answer
  • Jack was playing with a toy car and a track that records velocity over time using sensors and it generated the graph below:
    14·1 answer
  • Which statement best describes how organisms demonstrate the transformation of energy?
    10·1 answer
  • Balance the following equation: N2 + H2 --> NH3
    6·1 answer
  • Household ammonia used for cleaning contains about 10 g (two significant figures) of NH3 in 100 mL (two significant figures) of
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!