# How do you calculate decay per second?

## How do you calculate decay per second?

Calculations Using the First Order Rate Equation: r = k[N] The rate of decay is often referred to as the activity of the isotope and is often measured in Curies (Ci), one curie = 3.700 x 1010 atoms that decay/second.

### What is the SI unit of decay constant?

s-1
The SI unit of decay constant is s-1.

What’s the equation for alpha decay?

An example will show the use of this equation. For the decay reaction 238U → 234Th + 4He, the mass values for 238U and 4He are in Table 3.1; for 234Th it is 234.043 594. Thus we obtain Qα = –931.5 (234.043 594 + 4.002 603 – 238.050 7785) = 4.274 MeV.

What is the formula for growth and decay?

exponential growth or decay function is a function that grows or shrinks at a constant percent growth rate. The equation can be written in the form f(x) = a(1 + r)x or f(x) = abx where b = 1 + r.

## What’s the rate of decay?

The decay rate of a radioactive substance is characterized by the following constant quantities: The half-life (t1/2) is the time taken for the activity of a given amount of a radioactive substance to decay to half of its initial value.

### What is the equation for alpha decay?

How is the decay formula used in math?

Exponential problems usually move around the decay formula in mathematics. To show money, bacteria, fishes in a pond, the exponential growth or decay formula is used frequently. Where continuous growth or decay are shown in the form of small r and t is the time during which decay was measured.

How to calculate k using the exponential decay formula?

Using the exponential decay formula to calculate k, calculating the mass of carbon-14 remaining after a given time, and calculating the time it takes to have a specific mass remaining . Created by Sal Khan. This is the currently selected item. Want to join the conversation? Posted 7 years ago.

## What is the differential equation of radioactive decay?

e is the Euler’s number equal to 2.71828. The differential equation of Radioactive Decay Formula is defined as. The half-life of an isotope is the time taken by its nucleus to decay to half of its original number.

### How is the decay formula related to compound interest?

The decay formula can be compared to compound interest formula where interests are being compounded continuously. Keep in mind that value of variables varies based on one equation to another but structure of formula always remains the same showing the equal relationship. Here is how to represent the decay formula in mathematics.