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AVprozaik [17]
4 years ago
8

Why is radon-222 considered dangerous?

Chemistry
2 answers:
Marysya12 [62]4 years ago
5 0

q1. all of these

q2 false

q3 can be in liquid, solid or gas forms

q4 idk

q5 They usually remain radioactive for less than 100 years.

q6 idk

q7 TRUE

educated guess and i remember some things from chem. Hope its all good


olga nikolaevna [1]4 years ago
4 0

Answer:

given below

Explanation:

1) correct answer is option d)

it is the second leading cause of lung cancer in USA it cannot be seen and smelled or tasted.

2) false

nuclear medicine can be used for wider variety of diseases.

3) correct answer is option d)

it is correct that radioactive element are present in liquid, solid or gas forms and it is very hazardous if they leaked and it can remain radioactive for long period of time.

4) the correct answer is option c

spent fuel are radioactive have many isotopes and is to be disposed  very carefully and it remains radioactive for less than 100 years.

5) True

Radioactivity waste should be properly disposed as it contain very hazardous material which can affect humans.

6) True

Nuclear energy is a renewable energy and it can be used as the alternative source of energy it produce less pollution.

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Which of the following best describes how an ionic compound dissolves in water?
Nadusha1986 [10]

The statement that best describes how an ionic compound dissolves in water is as follows: it separates into individual molecules and is an electrolyte, which is option C.

<h3>What is an ionic compound?</h3>

Ionic compound is any compound is a chemical compound composed of ions (charged atoms) held together by electrostatic forces termed ionic bonding.

Ionic compounds are electrolytes i.e. a substance when, in solution or when molten, ionizes and conducts electricity.

For example; sodium chloride (NaCl) is an ionic compound breaks down into sodium ions (Na+) and chloride ion (Cl-).

Therefore, the statement that best describes how an ionic compound dissolves in water is as follows: it separates into individual molecules and is an electrolyte.

Learn more about ionic compound at: brainly.com/question/9167977

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4 0
2 years ago
Which is not true about all of these elements?
Digiron [165]

Answer:

umm it does not show what elements but I think its C. number of protons

8 0
3 years ago
Which is the Lewis structure for H3PO4?
meriva

Answer:

C. H:C:H:H

Explanation:

Follow these simple steps to correctly draw a Lewis dot structure: Add up the total number of valence electrons found in the entire compound. Draw the simple structure (skeleton structure) of the compound by connecting everything with single bonds only. Add electrons to all the noncentral atoms. Put any unused electrons on the central atom.

4 0
3 years ago
Bromocresol green, Ka=2.0×10−5, is yellow in its protonated form (HX) and blue in its ionized form (X−). At what pH will bromocr
nydimaria [60]

Answer:

pH = 4,70

Explanation:

For bromocresol, as HX is yellow and X⁻ is blue, the indicator will be a perfect green color when HX = X⁻.

Using Henderson-Hasselbalch formula:

pH = pka + log [X⁻]/[HX] <em>(1)</em>

Where pka is -log ka = -log2,0x10⁻⁵ = 4,70

As HX = X⁻, [HX] / [X⁻] = 1

Replacing in (1):

pH = 4,70 + log 1

pH = 4,70 + 0

<em>pH = 4,70</em>

<em></em>

I hope it helps!

4 0
4 years ago
What happens when the two atoms are fairly close?
mezya [45]
The atoms are not really sharing electrons as much as they are fighting over them this creates a force that makes the atoms stick together.
8 0
3 years ago
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