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mr_godi [17]
2 years ago
9

How is the preodictable arranged by atomic mass, coloms , and rows

Chemistry
2 answers:
bearhunter [10]2 years ago
5 0

answer:an arrangement of elements in columns, based on a set of properties that repeat from row to row

Explanation:

hope this helps love <3

marta [7]2 years ago
5 0

Answer:

I dont get it

Explanation:

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Which statements correctly describe the decay rates of radioactive isotopes?
storchak [24]

Answer: b} The exact time when an individual atom will decay can be accurately predicted.

c} After each half-life, the amount of radioactive material is reduced by half.

Explanation:

All radioactive decay  follows first order kinetics.

Rate law expression for first order kinetics is given by:

t=\frac{2.303}{k}\log\frac{a}{a-x}

where,

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Expression for calculating half life, which is the time taken by the half of the reactants to decompose is:

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What is 2n^2 rule ( of science)​
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2n² rule:

This rule is used to determine number of electrons in particular shell.

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n=2 means L shell

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n=4means N shell

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