3. How many valence electrons are in the outermost energy level of each of the following elements? a. Helium
b. Lithium
c. Nitrogen
d. Magnesium

Answers

Answer 1
Answer: A.helium has no valency 
B.lithium has 1
C.nitrogen has either 5 or 3 because it bonds outer orbital
D.magnesium has 2

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Which statement best describes the properties of sodium chloride?A.) Sodium chloride is a malleable solid.
B.) Solid sodium chloride is a good conductor of electric current.
C.) Sodium chloride has a low melting point.
D.) Liquid sodium chloride is a good conductor of electric current.

Answers

NaCl solutions are electrically conductive because they are a powerful electrolyte in which the constituent ions completely separate, resulting in free-moving ions in the solution.c Thus, option D is correct.

What best describes the properties of sodium chloride?

The ions (Na+& Cl) are free to move around and can thus function as charge carriers, since the motility of individual atoms or molecules in liquid state is significantly larger than that of solid state. Because of the free ions, molten sodium chloride is a good conductor of electricity.

The charged particles (ions) in solid “[NaCl]” cannot move because they are bound by powerful electrostatic forces, making it a poor conductor of electricity. They cannot conduct electricity as a result.

Therefore, NaCl solutions are electrically conductive because they are a powerful electrolyte in which the constituent ions completely separate, resulting in free-moving ions in the solution.

Learn more about sodium chloride here:

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D. because sodium chloride is an ion

first of all , sodium chloride is salt and  we all know that it is not malleable.

sodium chloride is an ion which do conduct electricity but not when they are solid.....they only do so when they are molten or aqueous ( dissolved in water )

sodium chloride is an ion. ions have high melting points.

D is true because as i have mentioned above , ions will conduct electricity when dissolved in water / aqueous or molten.......... HOPE IT HELPED !!!!!!

I need help with this today!!!1. When light is scattered a __________ is created.
2. Describe how we see using the 6 parts of the eye.(List 6 parts of the eyes)
3. Describe how we hear using the 8 parts of the ear (List 8 parts of the ear)
4. What do we call the material any wave travels through?
5. Sound are caused by______________.
6. Sound travels in ___________temperatures.
7. A sound will travel _______________ in a denser medium.
8. What happens to the molecules when they are heated?
9. What are 3 ways heat transfer energy?
10. How does convection in the Earth's mantle move plates?
11. What happens during thermal expansion?
12. How radiation is related to EM waves?
13. What is contraction? What would cause it to happen?
I would very apprecieate if you guys help me all of 13 questions

Answers


1. Rainbow (white light is split into its subsequent wavelengths)
2. Light enters through the cornea, is adjusted by the lens, the cones and rods of the retina are responsible for the perception of color and shadows, which are sent through the optic nerve to the occipital lobe of the brain.

3. Sound waves are intercepted by the pinna, travels through the auditory canal, reverberates on the eardrum, the vibrations travel through the ossicles of ear (hammer, anvil and stirrup), continuing to the cochlea and are sent through the auditory nerve to the brain.

4. A medium

5. Vibrations

6. All

7. Faster

8.Their kinetic energy increases

9. Conduction, convection and radiation

10. The heating of metals in the mantle, creates a current which slowly moves the plates above it.

Which of the following is NOT a likely result of regular physical activity?A.
increased energy
B.
decreased attention span
C.
improved school attendance
D.
improved self-image


Please select the best answer from the choices provided.

A
B
C
D

Answers

Answer:

B: Decreased attention span is the answer.

Explanation:

Just took the test on e d g e n u i t y.

Answer:

iitz b

Explanation:

How is net force determined if two students moving a piano exert force in the same direction

Answers

The net force is determined is basically who is pushing harder in a specific direction.Like since there bith pushing in the same direction the net force is in the direction that they are pushing.

Air Mass is a large body of air that has the same ____________ and ___________ throughout.

Answers

Characteristics? I think for first blank

WHAT WOULD HAPPEN IF A HUMAN'S BODY TEMPERATURE WAS 98.6 DEGREES CELSIUS??

Answers

You would die you would be 209.48 Fahrenheit and being higher than 107 Fahrenheit is very bad so imagine what would happen to you :(

Answer:

You would die you would be 209.48 Fahrenheit and being higher than 107 Fahrenheit is very bad so imagine what would happen to you :(

Explanation: