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Crank
3 years ago
10

Which of these elements has the smallest atomic radius?

Chemistry
1 answer:
nadya68 [22]3 years ago
7 0

Answer:

3. be

Explanation:

it shows it in the word search

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You are asked to write observations about a 100g sample of Nitrogen-16 before it decays, but you're running late. In order to ma
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Answer:

You cannot make observations if you are 57 seconds late into the lab.

Explanation:

The atomic nucleus can split by decay into 2 or more particles as a result of the instability of its atomic nucleus due to the fact that radioactive elements possess an unstable atomic nucleus.

Now, the primary particles which are emitted by radioactive elements in order to make them decay are alpha, beta & gamma particles.

The half life equation is;

N_t = N₀(½)^(t/t_½)

Where:

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N_t = number of radioactive atoms remaining after decay over time t

We are given;

t = 57 secs

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Now, half life of Nitrogen-16 from online sources is 7.2 seconds. t_½ = 7.2

Thus;

N_t = 100(1/2)^(57/7.2)

N_t = 0.4139g

We are told that In order to make observations, you require at least .5g of material.

The value of N_t you got is less than 0.5g, therefore you cannot make observations if you are 57 seconds late.

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