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devlian [24]
3 years ago
15

What family of elements has 7 valence electrons?

Physics
2 answers:
Anna35 [415]3 years ago
6 0

The elements in this family are fluorine, chlorine, bromine, iodine, and astatine. Halogens have 7 valence electrons, which explains why they are the most active non-metals. They are never found free in nature.

ivann1987 [24]3 years ago
4 0
Group 17 (VII) (halogens)
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Answer:

minimum angle is 128.69°

Explanation:

given data

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solution

we know ball velocity with respect field will be

ball velocity = v1  +v2

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we consider angle that player hit ball is θ

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Vector vector a has a magnitude of 29 units and points in the positive y-direction. when vector vector b is added to vector a ,
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Good morning.

We have:

\mathsf{\overset{\to}{a} = 29\overset{\to}{j}}

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We add the vector -a to both sides:

\mathsf{\overset{\to}{b} = -18\overset{\to}{j} -\overset{\to}{a} = -18\overset{\to}{j} -29\overset{\to}{j}}\\ \\ \mathsf{\overset{\to}{b}=-47\overset{\to}{j}}


Therefore, the magnitude of b is 47 units.
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Answer:

A

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