CHEMISTRY HIGH SCHOOL

What is a chemical bond? A. The attraction of two atoms that holds the atoms together
B. A substance that's composed of atoms
C. A representation of chemical properties
D. The force that holds together the elements in a compound

Answers

Answer 1
Answer: A., I believe. It's either an ionic, covalent, or hydrogen bond
Answer 2
Answer:

Chemical bond is the attraction of two atoms that holds the atoms together.

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A propane torch is lit inside a hot air balloon during preflight preparations to inflate the balloon. What condition of the gas remains constant

Answers

Answer: Pressure

Explanation:

Why are some elements more reactive than others?

Answers

All other atoms have less stable electron numbers, so they react with each other and share electrons to be more stable. The most reactive elements tend to be short one or two electron or have one or two extra electrons.
because of extra electrons

Write these numbers rounded to the three nearest significant figures

Answers

Answer:

(a) 52.2 mL helium

(b) 18.0 g nitrogen

(c) 78.5 mg MSG

(d) 23,600,000 mm wavelength

(e) 0.00420 kg lead

Rounded the numbers to three nearest significant figures.

2.The image below shows two nitrogen atoms. For these two atoms to form a stable molecule, N2, how many electrons would have to be part of covalent bonds?

Answers

D. 6 electrons

A single nitrogen atom has five electrons in its outer energy level to start, and will be most stable with an octet, or 8 electrons in its outer level.

Since N2 is a covalent bond, the lewis dot structure of  N2 would have a triple bond. Each bond contains 2 electrons, so if it has a triple bond it contains 6 electrons. 
Calculate the number of valence electrons of N2
N= 2x 5 = 10 
N2 has a total of 10 valence electrons, to become stable each N atom needs 8 electrons. 
So, therefore, 6 electrons would have to be a part of covalent bonds because they share 6 electrons in a triple bond. 

Where would sound travel the slowest?Question 3 options:

At the equator


At the North Pole


In New York City


In the pine forests of Georgia

Answers

Answer: In New York City

Explanation: I'm not a nerd but I think it would be that because when your in the middle of new York city, and you scream it echos.

Answer:

I believe it’s 4

Explanation:

Amber was used by the Greeks to study? A.) metallurgy B.) magnetism C.) static charge D.) Jewelry Making

Answers

Answer:

The correct option is C.) static charge

Explanation:

Rubbing certain objects together, such as an amber bar with a bar covered with wool or skin, resulted in small charges that attracted small iron objects. By rubbing the bars together for a long time, it could cause a spark to appear.

Have a nice day!

A) Metallurgy

I hope this one is the correct one , its been a while sine I did history .

Good Luck!
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