3 years ago

I need help with number 3. is the answer 1,2,3,or4

1 answer:

8 0

Answer:

1 and 4

Explanation:

in both pictures the temperature is cooling down

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rodikova [14]

Answer:

Z=22.70

Explanation:

It is given that,

An element Z that has two naturally occurring isotopes with the following percent abundances as follows :

The isotope with a mass number 22 is 65.0% abundant; the isotope with a mass number 24 is 35.0% abundant.

The average atomic mass for element Z is given by :

$Z=\dfrac{22\times 65+24\times 35}{100}\\\\Z=22.7$

So, the average atomic mass for element Z is 22.70.

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4 years ago

svetoff [14.1K]

All phosphorus atoms have the same atomic number. Hope i helped

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4 years ago

zubka84 [21]

Answer:

It emits energy since to move from a higher energy level to a lower energy level or ground state, it must lose energy.

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2 years ago

kirza4 [7]

3.4 x10^3 best answer to the question

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3 years ago

Anastasy [175]

Answer:

It is called a salt bridge

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3 years ago