Answer is: mass number of element is 234.
<span>Alpha particle is nucleus of a </span>helium-4<span> atom, which is made of two </span>protons<span> and two </span>neutrons<span>.
</span>²³⁸U → ²³⁴Th + α (alpha particle).
Alpha decay is radioactive decay<span> in which an </span>atomic nucleus<span> emits an </span>alpha particle<span> (helium nucleus) and transforms into an atom with </span>an atomic number that is reduced by two <span>and </span>mass number<span> that is reduced by four</span><span>.</span>
Answer:
1 and 3 i think so i could be wrong
Intensive properties are useful for identifying a substance simply because these properties do not depend on the amount of sample, nor do they change according to conditions.
The correct answer choice which is a physical property of matter is boiling point.
Polymers are long chains of <u>molecules</u>
The method which I would use to separate two liquids with different boiling points is <u>distillation</u>
The particles are located in the nucleus of an atom are protons and neutrons
The type of molecular model which is used to represent very large molecules like proteins is ribbon diagram
The methods which is used to separate a mixture according to the size of the particles are filtration and chromatography
<h3>What is a mixture?</h3>
A mixture is a substance which contains two or more constituents which can easily be separated by physical means
So therefore, the methods which is used to separate a mixture according to the size of the particles are filtration and chromatography
Learn more about mixtures:
brainly.com/question/2331419
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Answer:
D) N-Cl.
Explanation:
The electronegativity of the elements in Group 5 (N. P As and Bi) decreases as we go down the Group so N is the most electronegative and chlorine is less able to draw electrons away from N than from the other elements in Group 5.
