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love history [14]
2 years ago
8

I need yall help with this one and i can make yall brilientist if u get it right plus yall get 50 points

Chemistry
2 answers:
mixas84 [53]2 years ago
6 0

Answer:

D

Explanation:

amid [387]2 years ago
4 0

Answer:

C. and B. im pretty sure hope it helps

Explanation:

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Consider a 100-gram sample of radioactive cobalt-60.
svetlana [45]

It will take 5.2 years to decay.

The half life of cobalt-60 is 5.2 years. The half life is the time taken for the mass of the substance to decrease by a half.

here, the amount of remaining substance is 50%,

so, (\frac{1}{2} )^{n} = 0.5

n. log (0.5) = log (0.5)

n = 1

So it would take 1 half lives to decay this much, which is 1 x 5.2 which is 5.2 years.

what do you mean by radioactive decay ?

The process through which an unstable atomic nucleus loses energy via radiation is known as radioactive decay, also known as nuclear decay, radioactivity, radioactive disintegration, or nuclear disintegration. A material that has unstable nuclei is considered as radioactive.

Learn more about decay here:-

brainly.com/question/13853996

#SPJ1

7 0
1 year ago
2. Different versions of a gene
scoray [572]

Answer:

I believe it's A

Explanation:

Hope this helps! ^-^

8 0
3 years ago
Read 2 more answers
"the number of quantum numbers needed to describe the state of an atomic electron is"
Blababa [14]
To completely describe an electron in an atom, four quantum numbers are needed: energy (n), angular momentum (ℓ), magnetic moment (mℓ), and spin (ms). The first quantum number describes the electron shell, or energy level, of an atom.
5 0
3 years ago
Identify the solute and solvent in each of the solutions. A. salt ( NaCl ) (NaCl) in water salt: water: B. air (a solution of 78
stira [4]

Answer:

A) solute - NaCl, solvent - water

B) solute - O2 and other gases, solvent - N2

C) solute - ethanol, solvent - water

D) solute - tin, solvent - copper

Explanation:

Solute(s) is/are the minor component(s) in a solution, dissolved in the solvent.

Solvent is the component of a solution that is present in the greatest amount. It is the substance in which the solute is dissolved.

If both solute and solvent exist in equal quantities (such as in a 50% ethanol, 50% water solution), the concepts of "solute" and "solvent" become less relevant, but the substance that is more often used as a solvent is normally designated as the solvent (in this example, water).

5 0
3 years ago
Although the order of elements is based on atomic number, vertical families share similar chemical properties.
scoray [572]

Answer:

It's true

Explanation:

Uhhh, the internet! lol.

4 0
3 years ago
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