## What is the order of reaction with respect to a?

The overall order of the reaction is found by adding up the individual orders. For example, if the reaction is first order with respect to both A and B (a = 1 and b = 1), the overall order is 2. We call this an overall second order reaction.

## How do you determine order with respect to each reactant?

The overall reaction order is the sum of the orders with respect to each reactant. If m = 1 and n = 1, the overall order of the reaction is second order (m + n = 1 + 1 = 2). describes a reaction that is first order in H+, first order in OH−, and second order overall.

## What is the second order rate law?

Second Order Reactions are characterized by the property that their rate is proportional to the product of two reactant concentrations (or the square of one concentration).

## Is radioactive decay first-order?

Because radioactive decay is a first-order process, the time required for half of the nuclei in any sample of a radioactive isotope to decay is a constant, called the half-life of the isotope. Radioactive decay is a first-order process.

## Is half life in minutes or seconds?

The unit is usually seconds. But it really depends on the situation you are in. If you are talking about uranium-238, then you’ll be talking about a half life in the billions of years. However, if you are talking about the half-life of a muon, then it’ll be in seconds or microseconds.

## What are the units of rate constant for zero order reaction?

The units of the rate constant, k, depend on the overall reaction order. The units of k for a zero-order reaction are M/s, the units of k for a first-order reaction are 1/s, and the units of k for a second-order reaction are 1/(M·s).

## What fraction of a reactant has been consumed after 4 half lives in a first order reaction?

0.0625

## What is the heaviest element that is not radioactive?

It has 83 protons and a magic number of 126 neutrons, and an atomic mass of amu (atomic mass units). Primordial bismuth consists entirely of this isotope….Bismuth-209.

General | |
---|---|

Symbol | 209Bi |

Names | bismuth-209, Bi-209 |

Protons | 83 |

Neutrons | 126 |

## Which element is the most unstable?

In April 2019 it was announced that the half-life of xenon-124 had been measured to 1.8 × 1022 years. This is the longest half-life directly measured for any unstable isotope; only the half-life of tellurium-128 is longer….Tables.

Element | molybdenum |
---|---|

unstable in italics odd neutron number in pink | 98 Mo |

96 Mo | |

95 Mo | |

92 Mo |

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