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3 years ago

An atom that has only one electron in its valence electron shell is_______chemically reactive.

Physics

1 answer:

Rasek [7]3 years ago

4 0

Highly

Explanation:

An atom that has one electron in its valence electron shell is highly chemically reactive.

Such atoms are called Alkali metals. They occupy the first group on the periodic table and they are a bunch of metals.

The number of electrons in the valence shell of atoms determines the reactivity of an element.
Atoms are gained or lost or shared in order to attain an octet configuration.
When an atom with one electron in the valence shell loses this electron, it will become stable.
This implies that it will attain its octet.
This makes them take part in reactions that will ensure they lose that electron.
Examples of such atoms Li, Na, K, Rb, Cs and Fr.

learn more:

Reactivity of Na brainly.com/question/6496202

#learnwithBrainly

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4 years ago

Megan walks 1100 m to the left in 330s. What was her average speed in m/s?

Hunter-Best [27]

Answer:

3.33m/s

Explanation:

Speed is the change in distance of a body with respect to time.

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Time = 330s

Speed = 1100/330

Speed = 3.33m/s

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4 years ago

A car travels at a constant speed of 15 m/s for 2 minutes. The car increases its speed from 15 m/s to 25 m/s during the next min

Rzqust [24]

Answer:

Graph F.

Explanation:

From the question given above, the following information were obtained:

1. The car travelled at a constant speed of 15 m/s for 2 minutes. This implies that the car is already moving and the graph can not be drawn from the origin.

Therefore, graph G is wrong.

2. The car increases its speed from 15 m/s to 25 m/s during the next minute and travels at a constant speed of 25 m/s for 2 more minutes.

This implies that the graph of the motion will project upward.

Therefore, graph H and J are wrong.

From the illustrations above, graph F gives the correct discription for the motion of the car.

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3 years ago

Lien uses a spring scale to pull a block toward the right across the lab table. The scale reads 8 N. Which force should Lien con

lana66690 [7]

Answer:

<h2>Frictional force</h2>

Explanation:

For the block placed on the table, there are several force acting on the body along the horizontal and vertical axis. All this forces tends to keep the body in a state of equilibrium.The forces acting along the horizontal are the moving force (Fm) and the frictional force (Ff).

Frictional force are forces that acts opposite to the force that causes the body to move (moving force).

If Lien uses a spring scale to pull a block toward the right across the lab table and the scale reads 8 N, this means that the force that causes the body to move is the 8N force (moving force).

Taking the sum of force along the horizontal;

$\sum fx = ma_x$

Since the body is static, max = 0

$\sum fx = 0\\fm+(-Ff)= 0$

Note that the frictional force acts is the force of opposition acting in the negative x direction.

$fm = 0+Ff\\fm = Ff$

Since Fm = 8N, Ff will also be equal to 8N.

Based on the above proof, Lien can also conclude that 8 N is a frictional force

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3 years ago