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AnnZ [28]
3 years ago
13

Study the diagram below to the following question.which of the above images is a molecule?

Chemistry
1 answer:
kotegsom [21]3 years ago
4 0
I can help you I just need the image

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Which pair of properties describes the elements in Group 18?
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Answer

-12

Explanation:

Cs 22 is not close to -12

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***50 points***<br><br> Magnesium reacts with aluminum chloride
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What does the atomic number of an element tell you about the element?
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im sorry but um can someone go see if they can help me with my most recent question...if you don't know the answer its cool just
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Answer:

1. The ground state describes the lowest possible energy that an atom can have. An electron is normally in its ground state, the lowest energy state available.

2. In a metal, atoms readily lose electrons to form positive ions (cations). These ions are surrounded by delocalized electrons, which are responsible for conductivity. The solid produced is held together by electrostatic interactions between the ions and the electron cloud. These interactions are called metallic bonds. The metallic bonding model explains the physical properties of metals. Metals conduct electricity and heat very well because of their free-flowing electrons. As electrons enter one end of a piece of metal, an equal number of electrons flow outward from the other end.

3.  Physical properties are affected by the strength of intermolecular forces. Melting, boiling, and freezing points increase as intermolecular forces increase. Vapor pressure decreases as intermolecular forces increase. The physical state and properties of a particular compound depend in large part on the type of chemical bonding it displays. This is because the energy required to disrupt the intermolecular forces between molecules is far less than the energy required to break the ionic bonds in a crystalline ionic compound.

Explanation:

This is from 38 minutes ago. Sorry for late reply.  I really hope this helps. :)

4 0
3 years ago
How many grams of kbr must be dissolved to make 25.0 ml of a solution that has a molarity of 0.85 m?
lyudmila [28]
Molarity is defined as the number of moles of solute in 1 L of solution 
molarity of solution to be prepared is 0.85 M
this means that there should be 0.85 mol of KBr in 1 L of solution 
if 1 L contains - 0.85 mol
then 25.0 mL should contain - 0.85 mol / 1000 mL x 25.0 mL = 0.0213 mol 
mass of KBr - 0.0213 mol x 119 g/mol = 2.53 g
mass of KBr that should be dissolved in 25.0 mL is 2.53 g

4 0
3 years ago
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