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3 years ago

1)Typically, atom gain or lose electrons to achieve (1 point)

2 answers:

6 0

1)Typically, atom gain or lose electrons to achieve
I believe the correct answer from the choices listed is option C, a stable electron configuration

2)The formation of an ionic bond involves

I believe the correct answer is A, transfer of electrons since it is electrons that is involved in a chemical reaction.

Flura [38]3 years ago

6 0

Question 1:

Answer:

C. Stable electronic configuration

Explanation:

According to Lewis, the atom will be stable when it has 8 electrons in its outermost energy level.

Therefore, atoms tend to undergo chemical reactions and form bonds by either losing, gaining or sharing electrons in order to fulfill the condition of having 8 electrons in outermost shell and become stable

Question 2:

Answer:

A. Transfer of electrons

Explanation:

Electrons are the part of the atom that are involved in bonding. Atoms (except for noble gases) tend to lose, gain or share electrons in order to have 8 electrons in outermost shell and achieve stability.

Now,

1- when an atom loses an electron or more to another atom that gains these electrons, transfer of electrons occur and ionic bond takes place

2- when atoms share an electron or more, a covalent bond occurs

Based on the above, transfer of electrons represents the formation of ionic bond

Hope this helps :)

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If a freely suspended vertical spring is pulled in downward direction and then released, which type of wave is produced in the s

larisa [96]

Answer:

longitudinal wave

Explanation:

it is perpendicular to the direction of the wave

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3 years ago

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An object is placed 18 cm in front of spherical mirror.if the image is formed at 4cm to the right of the mirror, calculate it's

ivolga24 [154]

1) Focal length

We can find the focal length of the mirror by using the mirror equation:
$\frac{1}{f}= \frac{1}{d_o}+ \frac{1}{d_i}$ (1)
where
f is the focal length
$d_o$ is the distance of the object from the mirror
$d_i$ is the distance of the image from the mirror

In this case, $d_o = 18 cm$ , while $d_i=-4 cm$ (the distance of the image should be taken as negative, because the image is to the right (behind) of the mirror, so it is virtual). If we use these data inside (1), we find the focal length of the mirror:
$\frac{1}{f}= \frac{1}{18 cm}- \frac{1}{4 cm}=- \frac{7}{36 cm}$
from which we find
$f=- \frac{36}{7} cm=-5.1 cm$

2) The mirror is convex: in fact, for the sign convention, a concave mirror has positive focal length while a convex mirror has negative focal length. In this case, the focal length is negative, so the mirror is convex.

3) The image is virtual, because it is behind the mirror and in fact we have taken its distance from the mirror as negative.

4) The radius of curvature of a mirror is twice its focal length, so for the mirror in our problem the radius of curvature is:
$r=2f=2 \cdot 5.1 cm=10.2 cm$

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3 years ago

A book weighing 12 n is placed on a table. how much support force does a table exert on the book?

Alenkasestr [34]

It should be 12 N. the force of the book on the table should be the same as the force of the table on the book.

7 0

3 years ago

Law of Conservation of Energy.

Tems11 [23]

Energy cannot be created nor be destroyed

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3 years ago

A student measured the specific heat of water to be 4.29 J/g.Co. The

leonid [27]

Answer:

2.63 %.

Explanation:

Given that,

The calculated value of the specific heat of water is 4.29 J/g.C

Original value of specific heat of water is 4.18 J/g.C.

We need to find the student's percent error. The percentage error in any quantity is given by :

$P=\dfrac{|\text{original value-calculated value}|}{\text{original value}}\times 100\\\\P=\dfrac{4.29-4.18}{4.18}\times 100\\\\P=2.63\%$

So, the student's percent error is 2.63 %.

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3 years ago