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I can answer the first two for now 1. As atomic radius goes across a period, it decreases because of the stronger pull on the electron cloud but increases across due to shielding effect or more shells. 2. Elements like Oxygen and Flourine tend to have high electronegativity because of their desire ...

1. What is the trend of the atomic radius in the period of a periodic table? Why is this so?
2. Briefly explain why elements like oxygen and fluorine have high electronegativity.
3. When balancing a redox reaction in an acidic solution, what do you balance H₂O with?

Sorrow2 wrote: ↑December 14th, 2022, 2:10 pm any good crimebusters website i can study?

Hello, if you scroll to the bottom of the wiki page for Crime Busters, there are some helpful websites you can use. The FBI's website and Wikipedia are also helpful resources.

KingDelphinus wrote: ↑December 1st, 2022, 11:57 am What would be the properties of an atom with a really high ionization energy?

I'll start this marathon off:

1. Identify the three main components of Benedict's solution and describe each of their purposes.
2. Identify the three types of impressions.
3. Identify the natural force that is responsible for the formation of passive bloodstains.

For the fibers on the test, is it specific to some tournaments on whether we have to identify animal, vegetable, and synthetic vs. each individual fiber, or does it just depend on the creators of the test? According to the rules, test writers should only be asking for whether a fiber is animal, veg...

Alright, here’s my set of questions:

1. Explain why sodium chloride is conductive when dissolved in water.
2. What fibers from the rules list dissolve in bleach?
3. Explain the purpose of PCR in the context of a crime scene investigation.

For anyone who has not seen these changes, the schedule for Division C of the upcoming state competition has been changed to include Mystery Architecture and It’s About Time, which both count towards the team score. The updated schedule can be viewed here: https://ncscienceolympiad.ncsu.edu/wp-conte...

Here are my questions: 1) What bacteria is taq polymerase derived from? 2) Why do flame test emit colors. Describe in detail. 3) What fiber commonly undergoes mercerization? 1. Thermus aquaticus 2. Solids cause the flame to emit colors because the heat energy flame causes the electrons in the solid...

I apologize for the long wait. Here are my questions: 1. What plastic is commonly used in plexiglass? What properties of this plastic make it good for this application? 2. How does the fiber tenacity of fibers used in jeans compare to those used in leggings? How do you know? 3. A blood sample agglu...