The property of ionic compounds is <u>Option B. they react with water and oxygen.</u>
Ionic compounds are very strong and require a lot of energy to break down so they have high boiling and melting points. Ions are formed due to electrostatic attraction between oppositely charged ions. All ionic compounds form crystals. Ionic compounds tend to have high melting and boiling points. Ionic compounds are very hard and very brittle.
Ionic compounds conduct electricity when dissolved in water. A property that is not characteristic of ionic compounds is that they are good conductors of electricity as solid crystals. Description To form a neutral ionic compound the cation and anion charges must be balanced. Some of the physical properties of ionic compounds are Physical State Ionic compounds are solid and relatively rigid due to the strong attraction between cations and anions.
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I think the answer is D if I’m wrong I’m sorry.
Nitrogen fixation. most nitrogen fixation is performed by certain kinds of bacteria . Some of this bacteria live in bumps called nadules (NAHJ oolz) on the roots of certain plants.
Answer:
- <u>b. three half-lives</u>
Explanation:
The number of half-lives elapsed, n, is calculated dividing the time by the half-life time:
- n = time / half-life time
<u>a. A sample of Ce-141 with a half-life of 32.5 days after 32.5 days</u>
- n = 32.5 days / 32.5 days = 1 half-life
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<u>b. A sample of F-18 with a half-life of 110 min after 330 min</u>
- n = 330 min / 110 min = 3 half-lives
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<u>c. A sample of Au-198 with a half-life of 2.7 days after 5.4 days</u>
- n = 5.4 days / 2.7 days = 2 half-lives
Answer:
The correct option is C.
Explanation:
Nuclear fusion is a radioactive reaction - radioactivity involves the nucleus of an atom NOT the electrons. Nuclear fusion is the process in which two or more light atomic nuclei combine together to form a heavier atomic nucleus with the release of large amount of energy.
An example of a nuclear fusion reaction is shown below
³₁H + ²₁H ⇒ ⁴₂He + ¹₀n + energy