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Trava [24]
3 years ago
11

Why are alphabets in the order they are?

Chemistry
1 answer:
sineoko [7]3 years ago
4 0
Its arbitrary. It was developed on the greek phoenetic system and never reallybwas explained.
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6 0
3 years ago
HELP!!!!!!!!!!! *What are some of the safety concerns for Barium sulfate &amp; Barium Sulfide? Explain
Alex

BaSO₄ is relatively harmless, but BaS is highly toxic.

BaSO₄ is quite insoluble (240 µg/100 mL). It is a <em>mild irritant</em> in cases of skin contact and inhalation. However, it is <em>safe enough</em> that health professionals ask patients to drink a suspension of BaSO₄. The Ba is opaque to X-rays, so it makes the stomach and intestines more visible to radiographers.

BaS is soluble (7.7 g/100 mL). It reacts slowly with water and more rapidly in the acid conditions of the stomach to <em>release H₂S</em>.

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An H₂S concentration of 60 mg/100 mL can be <em>fatal within 30 min</em>.

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3 0
3 years ago
Predict which one of the following compounds would be insoluble in water.
quester [9]
CH4 is insoluble in water 
4 0
3 years ago
Read 2 more answers
Niobium-91 has a half-life of 680 years. After 2,040 years, how much niobium-91 will remain from a 300.0-g sample? 3 g 18.75 g 3
Vadim26 [7]
Amount of Niobium-91 initially
= 300/91 =3.2967mol
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7 0
3 years ago
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Describe the particle that is emitted during alpha decay. How do you think an atom changes when it undergoes alpha decay?
weqwewe [10]

Answer:

Helium nuclei is emitted during alpha decay.

Explanation:

Alpha radiations are emitted as a result of radioactive decay. The atom emit the alpha particles consist of two proton and two neutrons. Which is also called helium nuclei. When atom undergoes the alpha emission the original atom convert into the atom having mass number 4 less than and atomic number 2 less than the starting atom.

Properties of alpha radiation:

Alpha radiations can travel in a short distance.

These radiations can not penetrate into the skin or clothes.

These radiations can be harmful for the human if these are inhaled.

These radiations can be stopped by a piece of paper.

Example:

₉₂U²³⁸   →   ₉₀Th²³⁴  + ₂He⁴  + energy

8 0
2 years ago
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