Carbon-14 is the typical radioisotope used to date materials; however, it has a limitation to 40,000 years. A scientist who wants to date materials older than 40,000 years would most likely use ?
Answers
A scientist who wants to date materials older than 40,000 years would most likely use Potassium – argon dating or K-AR dating. Potassium-40 is a radioactive isotope of potassium that decays into argon-40. The half life of potassium-40 is 1.3 billion years far longer than carbon-14.
Answer:The answer would be uranium-238 hope this helps
Explanation:
Related Questions
use the reaction that occours when magnesium burns in oxygen to show how a reaction might be included in more than one category of reaction
What is a disadvantage of using a space-filling model to show a chemical compound?
All isomers of octane have the same(1) molecular formula (3) physical properties (2) structural formula (4) IUPAC name
Which best describes a compound such as magnesium oxide?
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Gamma rays are given off by stars, and by some radioactive substances.
They are extremely high frequency waves, and carry a large amount of energy.USES-Because Gamma rays can kill living cells, they are used to kill cancer cells without having to resort to difficult surgery.This is called "Radiotherapy", and works because healthy cells can repair themselves fairly well when damaged by gamma rays - but cancer cells can't. Getting the dose right is very important!There's also targeted radiotherapy, where a radioactive substance is used to kill cancer cells - but it's a substance that'll be taken up by a specific part of the body, so the rest of the body only gets a low dose. An example would be using radioactive iodine to treat cancer in the thyroid gland.
(2) increases
(3) remains the same
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As the temperature of liquid increases, its vapor pressure increases. Therefore, option (2) is correct.
What is vapour pressure?
Vapour pressure can be defined as the pressure exerted by a vapor with its condensed phases in a closed system at a given temperature. The equilibrium vapor pressure is also served as an indicator of the rate of evaporation of a liquid.
A material that has a high vapor pressure at normal temperatures is commonly referred to as a volatile material. The pressure exhibited by the molecules of the gas above a liquid surface is called vapor pressure.
The temperature and the vapor pressure of liquid are directly related to each other. If the temperature of the liquid increases, more gasmolecules have the energy to escape from the surface of the liquid.
Therefore, the vapor pressure increases with an increase in the temperature of the liquid.
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B. Condensation
C. Evaporation
D. Boiling
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The escape of molecules from the surface of a liquid is known as .
Further Explanation:
Phase transition is defined as the change from one state to another state but no change in chemical composition is observed. It is also known as a phase change, state change or physical change.
Sublimation
It is the process by which a substance directly gets converted from solid to vapor phase, without going through the liquid state. Naphthalene and dry ice are substances that undergo sublimation.
Condensation
It is the phase transition that occurs when vapors are converted into liquid. This is done by changing the temperature and pressure of the substance.
Evaporation
In this process, liquid changes into vapors. Here, temperature has to be elevated or heating is done. Energy is used up in the substance and therefore it is an endothermic process.
Boiling
It is a phase change in which liquid is converted to a gaseous state when liquid is heated to its boiling point.
Learn more:
1. Identify the phase change in which crystal lattice is formed: brainly.com/question/1503216
2. The main purpose of conducting experiments: brainly.com/question/5096428
Answer details:
Grade: Senior School
Subject: Chemistry
Chapter: Phase transition
Keywords: exothermic, endothermic, sublimation, deposition, vaporization, melting, phase transition, phase change, state change, physical change, solid state, liquid state, vapor state.
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a. True
b. False
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Final answer:
Acid precipitation is caused by the release of pollutants such as sulfur dioxide and nitrogen oxides when fossil fuels are burned. These pollutants combine with water in the atmosphere to form acids, which can fall to the earth as precipitation.
Explanation:
The statement in the question is True. Acid precipitation can indeed be traced back to the burning of fossil fuels. When we burn fossil fuels like coal, oil, and gas, they release pollutants into the atmosphere. These pollutants include sulfur dioxide and nitrogen oxides, which can combine with water in the atmosphere to form sulfuric acid and nitric acid. These acids can fall to the earth in the form of precipitation, such as rain, snow, or fog, hence the term 'acid precipitation'. This process can have harmful impacts on the environment, including pollution of bodies of water and damage to vegetation.
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Answers
37/20Ca --> 37/19K + 0/+1e
Explanation:
Transmutation, conversion of 1 element into another. A transmutation entails an amendment within the structure of atomic nuclei and thus is also induced by an action (q.v.), like nucleon capture, or occur ad libitum by decay, like disintegration and disintegration(qq.v.)