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3 years ago

PLZ HURRY! Tell if this statement is true or false. If it is false, how could you make it into a true statement?

1 answer:

5 0

1) true

dissolving: P
combustible: C
flammable: P
condensing: P
decomposing: C
shape: P
density: C
boiling point: P
melting point: P
rusting: P
reactivity: C
texture: P

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Lithium (Li) has 3 electrons. How many shells does an atom of Li have?

Liula [17]

She has 3 I just did that test. Have a good day

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3 years ago

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Predict whether each of the following ionic compounds is soluble in water: a.) LiCl d.) K2 ____________________ ________________

IrinaVladis [17]

Answer:

See answer below

Explanation:

a.) Lithium Chloride, LiCl is soluble in water.

b.) Silver Chloride, AgCl is insoluble in water.

c.) Barium Carbonate, BaCO3 is insoluble in water.

d.)Potassium, K2 is soluble in water.

e.) Iron (III) Nitrate Fe(NO3)3 is soluble in water.

All nitrates (NO3) are soluble in water.
Alkali metals are soluble in water.
Chlorides are soluble in water with the exception of AgCl and a few others.
Carbonates are generally insoluble in water.

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3 years ago

Which compound most likely has Atoms Held together by ionic bonds?

astra-53 [7]

Answer:

MgS Magnesium sulfide

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3 years ago

A certain radioactive isotope placed near a Geiger counter registers 160 counts per second. 32 hours later, the counter register

stealth61 [152]

I believe that the answer for this question would be option A. 8 HOURS. Based on the given scenario above about a certain radioactive isotope placed near a Geiger counter, the half-life <span>of the isotope 32 hours later would be 8 hours. Hope this is the answer that you are looking for. </span>

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3 years ago

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Which of the following isotopes would most likely be unstable and therefore radioactive?

svlad2 [7]

Answer: Mercury-194 is an unstable isotope and hence is radioactive.

Explanation: Mercury-194 is an isotope of mercury, having formula $_{80}^{194}\textrm{Hg}$

Number of protons in this isotope = 80

Number of neutrons in this isotope = 114

This isotope is radioactive in nature and under decay process by Electron Capture.

Electron capture reactions are the reactions in which a proton in a nucleus absorbs an electron and convert it into neutron. The resulting nucleus will have a decreased atomic number and same atomic mass.

Reaction for electron capture of mercury-194 follows:

$_{80}^{194}\textrm{Hg}+_{-1}^0\textrm{e}\rightarrow _{79}^{194}\textrm{Au}$

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3 years ago