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notka56 [123]
3 years ago
5

Pls answer rn due tmr pls pls fast

Chemistry
1 answer:
Lemur [1.5K]3 years ago
8 0

Answer:

From bottom to top, Troposphere, Stratosphere, Mesosphere, Thermosphere, & at the top, Exosphere.

Explanation:

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Match the characteristics and elements to their group.
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Kr is a Noble Gas. Na is an alkali metal. F is halogen.

Group 17 is halogens. Inert is Noble Gases. Odourless and colourless is Noble Gases. Alkali metals do not occur freely in nature. Alkali metals are malleable

Explanation:

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3 years ago
Cuando viajo, me gusta comprar recuerdos.
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to buy souvenirs

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7 0
2 years ago
A chemical reference book says that substance x is not soluble in water
oksano4ka [1.4K]
<span>The normal dividing line for soluble/not soluble is 0.1 M. 

If a substance, as a saturated solution at room temp and pressure, cannot form a solution concentration of 0.1 M, then it is considered insoluble. 

The 0.1 M figure was selected because _most_ substances are either well above that value or well below. Some substances (calcium hydroxide is one? not sure) come close to the 0.1 M dividing line but there are only a very few.</span><span>  
but most likely it wont mix</span>
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3 years ago
Even though plutonium-239 (t₁/₂=2.41310⁴ yr) is one of the main fission fuels, it is still a radiation hazard present in spent u
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Radioactive isotopes eventually decay, or disintegrate, to harmless materials. Some isotopes decay in hours or even minutes, but others decay very slowly. Strontium-90 and cesium-137 have half-lives of about 30 years (half the radioactivity will decay in 30 years). <u>Plutonium-239 has a half-life of 24,000 years.</u>

<u></u>

<u></u>

<h3>What is radioactive decay? </h3>

Radioactive decay is the emission of energy in the form of ionizing radiation. The ionizing radiation that is emitted can include alpha particles, beta particles and/or gamma rays. Radioactive decay occurs in unbalanced atoms called radionuclides.

Elements in the periodic table can take on several forms. Some of these forms are stable; other forms are unstable. Typically, the most stable form of an element is the most common in nature. However, all elements have an unstable form. Unstable forms emit ionizing radiation and are radioactive. There are some elements with no stable form that are always radioactive, such as uranium. Elements that emit ionizing radiation are called radionuclides.

Learn more about Radioactive decay

brainly.com/question/8788860

#SPJ4

8 0
1 year ago
An ion with six protons, seven neutrons, and a charge of 2+ has an atomic number of
Eva8 [605]
The atomic number is 6, you can also find out by the amount of electrons because, electrons and protons have the same charge.
5 0
3 years ago
Read 2 more answers
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