All categories

4 years ago

212 pb 82 is the isotope notation for iron. what is the atomic number, mass number, and number of both protons and neutrons?

Chemistry

1 answer:

o-na [289]4 years ago

5 0

Hello!

The mass number in isotope notation is denoted A, the atomic number is denoted as Z, and the element is denoted as X.

In the given isotope, the mass of the isotope is 212 amu, and the atomic number is 82.

We know that the number of electrons, and protons are equal to the atomic number. Therefore, there are 82 protons. Also, to find the number of neutrons, we subtract the atomic number from the atomic mass.

212 - 82 = 130 neutrons

<u>Final answers</u>:

Atomic Number: 82
Mass number: 212
Number of Protons: 82
Number of Neutrons: 130

You might be interested in

Which one is the correct answer <br> Thanks

trasher [3.6K]

Answer:

B calcium hydroxide

Explanation:

8 0

3 years ago

Read 2 more answers

Nitric oxide (NO) reacts with oxygen gas to produce nitrogen dioxide. A gaseous mixture contains 0.66 g of nitric oxide and 0.58

tigry1 [53]

Answer:

NO is the limiting reagent.

In this reaction 0.886 mole of NO2 is produced

Explanation:

The chemical equation for this reaction is

2NO(g) + O2(g) → 2NO2(g)

In this limiting reagent reaction, 2 moles of NO reacts with one mole of O2 to produce 2 mole of 2NO2

0.886 mole of NO * (2 mole of NO2/2 mole of NO) = 0.886 mole of NO2

0.503 mole of O2 * (1 mole of NO2/1 mole of O2) = 1.01 mole of NO2

Hence, NO is the limiting reagent.

In this reaction 0.886 mole of NO2 is produced

3 0

3 years ago

A baseball is traveling (+20 m/s) and is hit by a bat. It leaves the bat traveling (-30 m/s). What is the change in the velocity

Tpy6a [65]

D.

A more accurate answer would be -50 m/s. 50 m/s is the change in speed.

4 0

4 years ago

Read 2 more answers

Calculate the value of the diffusion coefficient D (in m2/s) at 547°C for the diffusion of some species in a metal; assume that

svetlana [45]

Answer : The value of diffusion coefficient is, $2.97\times 10^{-16}m^2/s$

Explanation :

Formula used :

$D=D_o\times \exp \left(-\frac{Q_d}{RT}\right )$

where,

D = diffusion coefficient = ?

$D_o$ = $5.6\times 10^{-5}m^2/s$

$Q_d$ = $177kJ/mol$

R = gas constant = 8.314 J/mol.K

T = temperature = $547^oC=273+547=820K$

Now put all the given values in the above formula, we get:

$D=5.6\times 10^{-5}m^2/s\times \exp \left(-\frac{177kJ/mol}{(8.314J/mol.K)\times (820K)}\right )$

$D=2.97\times 10^{-16}m^2/s$

Thus, the value of diffusion coefficient is, $2.97\times 10^{-16}m^2/s$

6 0

3 years ago

What is it called when water drops form something

GarryVolchara [31]

It is the gravitational force pulling on something

4 0

4 years ago