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FromTheMoon [43]
3 years ago
6

In a chemical reaction, atoms are rearranged to form new substances. This point

Chemistry
1 answer:
olga_2 [115]3 years ago
4 0

Answer:

yes that is right

Explanation:

can i have a brainlist pwease

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Artist 52 [7]

Answer:

Speed is measured over time.

Explanation:

7 0
3 years ago
Calculate the number of neutrons of 239Pu.
MrRissso [65]
145 since it’s the mass number plus protons I think
5 0
3 years ago
Read 2 more answers
I need help plez! Thank you!
vladimir2022 [97]
The answer should be E,C,F,B,A,D in that order.
6 0
3 years ago
What is the shortest half life
N76 [4]

Answer:

Hey!

Your answer is element A

Explanation:

Using the graph, the element A's emission of radioactive particles ends approximately after 6 years...

A HALF-LIFE IS "HALF" OF THAT TIME PERIOD!

So if the radiation goes for 6 years the half-life is 6 divided by two which gives you 3 years!

The rest however have a longer half-life...

Because they all end at 14 yrs so their half-life in 7 years!

HOPE THIS HELPS!!

8 0
3 years ago
What is the change of energy where the wavelength is 4078 A
Leni [432]

The change of energy : 4.8744 x 10⁺¹⁹ J

<h3>Further explanation</h3>

Radiation energy is absorbed by photons

The energy in one photon can be formulated as

\large{\boxed{\bold{E\:=\:h\:.\:f}}}

Where

h = Planck's constant (6,626.10⁻³⁴ Js)

f = Frequency of electromagnetic waves

f = c / λ

c = speed of light

= 3.10⁸

λ = wavelength

The wavelength is 4078 A = 4.078 x 10⁺⁷ m

\tt E=h.\dfrac{c}{\lambda}\\\\E=6.626\times 10^{-34}\times \dfrac{3.10^8}{4.078\times 10^{-7}}\\\\E=4.8744\times 10^{-19}~J

3 0
3 years ago
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