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
amid [387]
2 years ago
8

Which pair below describes isotopes of the same element?

Chemistry
2 answers:
FinnZ [79.3K]2 years ago
4 0

<u>Answer:</u> The correct answer is Option B.

<u>Explanation:</u>

Isotope is defined as the chemical specie which belong to the same element but differ in their molecular mass.

The isotopes have same atomic mass but differ in their mass numbers

Atomic number is defined as the number of protons or electrons that are present in a neutral atom.

Atomic number = number of protons = number of electrons

Mass number is defined as the sum of number of protons and neutrons that are present in an atom.

Mass number = Number of protons + Number of neutrons

Thus, isotopes of an element has same number of protons but they differ in the number of neutrons.

<u>For Example:</u> Chlorine has 2 isotopes, _{17}^{35}\textrm{Cl}\text{ and }_{17}^{37}\textrm{Cl}

  • <u>In _{17}^{35}\textrm{Cl} isotope:</u>

Number of protons = 17

Number of neutrons = 35 - 17 = 18

  • <u>In _{17}^{37}\textrm{Cl} isotope:</u>

Number of protons = 17

Number of neutrons = 37 - 17 = 20

Hence, the correct answer is Option B.

Mariulka [41]2 years ago
3 0
B because isotopes have the same number of protons but a different number of neutrons
You might be interested in
A solution is made by dissolving 4.87 g of potassium nitrate in water to a final volume of 86.4 mL solution. What is the weight/
lara31 [8.8K]

Answer:

A solution is made by dissolving 4.87 g of potassium nitrate in water to a final volume of 86.4 mL solution. The weight/weight % or percent by mass of the solute is :

<u>2.67%</u>

Explanation:

Note : Look at the density of potassium nitrate in water if given in the question.

<u><em>You are calculating </em></u><u><em>weight /Volume</em></u><u><em> not weight/weight % or percent by mass of the solute</em></u>

Here the <u>weight/weight % or percent by mass</u> of the solute is asked : So first convert the<u> VOLUME OF SOLUTION into MASS</u>

Density of potassium nitrate in water KNO3 = 2.11 g/mL

density=\frac{mass}{volume}

Density = 2.11 g/mL

Volume of solution = 86.4 mL

2.11=\frac{mass}{86.4}

mass = 2.11\times 86.4

mass=182.3grams

Mass of Solute = 4.87 g

Mass of Solution = 183.2 g

w/w% of the solute =

= \frac{mass\ of\ solute}{mass\ of\ solution}\times 100

=\frac{4.87}{183.2}\times 100

w/w%=2.67%

8 0
3 years ago
What do we call the type of chemical reaction that occurs in this step? Explain how the name of this type of reaction relates to
icang [17]
Figure it out yourself
6 0
2 years ago
What will the charge oxidiation state be for boron
artcher [175]

3+

So, compounds of boron contain boron in a positive oxidation state, generally +3. The sum of oxidation numbers of all constituent atoms of a given molecule or ion is equal to zero or the charge of the ion, respectively. ... In most of the stable compounds of boron, its oxidation number is +3

7 0
3 years ago
For the reaction between aqueous solutions of acetic acid (CH3COOH) and barium hydroxide, Ba(OH)2, 1. Write the balanced molecul
Crazy boy [7]

Answer:

2CH_3COOH(aq)+Ba(OH)_2(aq)\rightarrow Ba(CH_3COO)_2(aq)+2H_2O(l)

Explanation:

When acetic acid solution and barium hydroxide solution react together to give an aqueous solution of barium acetate and water

The balanced chemical reaction will be given by

2CH_3COOH(aq)+Ba(OH)_2(aq)\rightarrow Ba(CH_3COO)_2(aq)+2H_2O(l)

8 0
3 years ago
Will 1 gram of sugar or 1 gram of salt dissolve more quickly which one
Montano1993 [528]
1 gram of sugar because super molecules are bigger then the ions of dissolved salt
6 0
3 years ago
Other questions:
  • Janice needs to have a gastro-intestinal study. So she is given 375 mg of radiocontrast dye containing Barium-142. The half-life
    7·1 answer
  • chemist is using a solution of HNO3 that has a pH of 3.75. What is [OH− ] for the solution? × 10es001-1.jpg M n = What is the pO
    6·2 answers
  • The density of the fat tristearin is 0.95 g cm−3 . Calculate the change in molar Gibbs energy of tristearin when a deep-sea crea
    12·1 answer
  • Put the steps of the scientific method into the correct order.
    10·2 answers
  • Fill in the blacks on the sheet
    15·1 answer
  • Which temperature on the Celsius scale corresponds to 257k on a Kelvin scale
    11·1 answer
  • When a river flows over a cliff its
    8·2 answers
  • Identify the reagents represented by the letters in the above reaction scheme. (enter your answer as a string of letters without
    7·1 answer
  • What does the prefix non-represent?
    10·1 answer
  • Please help take all my points i need this asp
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!