Chemistry Middle School

Which of the following elements is the most reactive?
A. Mn
B. B
C. Sr
D. Kr

Answers

Answer 1

Answer:

The answer to this question is......C

Answer 2

Two or more than two atoms with different physical or chemical properties can not combine together to form an element. Therefore, Sr is the element which is most reactive. The correct option is option C.

What is element?

Element generally consist of atoms or we can atoms combine to form element. Atoms of an element is always same, means all the properties of all atoms of one type of element is same.

On going down the group of periodic table, size increases due to increase in number of shells, easiness to eject one electron increases. Group 2 elements are the most reactive as it has only 2 electrons to loose. Sr is the element which is most reactive among all the given options.

Therefore, Sr is the element which is most reactive. The correct option is option C.

To know more about element, here:

https://brainly.com/question/8460633

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Related Questions

How is momentum conserved in a system in which two satellites connect?

A)The one satellite has all the momentum before they connect, and then afterwards they share it.

B)Both satellites have momentum before they connect, and afterwards they have more momentum.

C)Both satellites have momentum before they connect, and afterwards they have less momentum.

D)Momentum is not conserved when the two satellites connect.

Answers

Answer:

Explanation:

C)Both satellites have momentum before they connect, and afterwards they have less momentum.

In physics, the law of conservation of momentum states that the momentum of an isolated system remains constant, unless acted upon by an external force. When two objects interact, the total momentum of the system before the interaction is equal to the total momentum of the system after the interaction.

When two satellites connect, their momentum can be considered as a closed system, meaning no external forces act upon them, and the total momentum of the system is conserved. This means that the total momentum of the two satellites before they connect is equal to the total momentum of the two satellites after they connect.

It is important to consider that when two objects connect, the kinetic energy of the system increases due to the relative motion of the two objects. This increase in kinetic energy can be converted into other forms of energy, such as heat, sound, and deformation. So the two satellites, even though they are now connected, will have less momentum and less kinetic energy due to these conversions.

Option D, that is momentum is not conserved when the two satellites connect, is incorrect as the law of conservation of momentum applies to isolated systems, and if no external force acted upon the two satellite the total momentum of the system must remain constant.

The answer is c
I hope this helps

need help with this one

Answers

Answer:

the other person is correct

Explanation:

because Ik

1. First 2. External/another 3. Second 4. Accelerate 5. Balanced 6. Unbalanced 7. Constant velocity 8. rest 9. Go 10. Go

Please note that this wording is very general definitely not correct according to physics conventions I.e it is better to say in equilibrium than balanced

Pluto was considered a planet from its discovery in 1930 until 2006. Why is it no longer called a planet?
A) Pluto does not directly orbit the Sun.
B) Pluto has not cleared its orbit of other objects.
C) Pluto does not orbit on the same plane with the other planets.
D) Pluto has not attained hydrostatic equilibrium.

It's not C, that's what I know

Answers

Answer:

B) Pluto has not cleared its orbit of other objects.

Explanation:

Pluto is a dwarf planet b/c it has not cleared its orbit of other objects.

Directly from library of congress: https://www.loc.gov/everyday-mysteries/astronomy/item/why-is-pluto-no-longer-a-planet/

Answer: D) Pluto has not attained hydrostatic equilibrium

Explanation:

Finish the statement: A dwarf planet…
has enough mass to orbit either a planet or the Sun.
has enough mass to clear its orbit of other objects.
has enough mass to attain a spherical shape.
doesn't have enough mass to have its own moon.

It's not A

Answers

Answer:

has enough mass to attain a spherical shape.

Explanation:

hope this helps

What are asteroids made of?
ice and rocks
ice and dust
rock and soil
rocky material

Answers

Rocky material…
Comets are more ice
Rocky material because asteroids are really made out of silicate rocks which are stonger so it will be D

Is this statement true or false?
The size and color of an object effects how it moves.
TRUE
FALSE

Answers

Answer:

True

Explanation:

The size of an objects effects how it moves

If the size is large the object moves slowly

And if the size is small the object move fastly

Using the graph above, which species has the highest management costs?

brown tree snakes
fire ants
mosquitoes
termites

Answers

The one with the most management cost is Brown tree snakes

Highest is brown tree snakes of u look at the colour coding then look at the graph you can see it is the most

Write a lab report on the lab ¨How do the process of conduction, convection, and radiation help distribute energy on earth.¨ for edge 1. Purpose- state the purpose of the lab.
2. Hypothesis- (Use if, then, because in your statement)
3. Materials- list all materials used in the lab
4. Procedures- state step by step what is being done in the lab
5. Observation/data- state what is being measured
6. Analysis/conclusion-state by summing up what was done in the lab and evaluate your
hypothesis with what actually happened

Answers

Answer: The sections of a lab report can vary between scientific fields and course requirements, but they usually contain the purpose, methods, and findings of a lab experiment. Each section of a lab report has its own purpose. 1. Title: expresses the topic of your study 2. Abstract: summarizes your research aims, methods, results, and conclusions

Explanation:

YOU'LL GET 60 POINTS + 5 STARS + HEART FROM ME IF YOU ANSWER THIS WITHOUT TROLLING
The table below shows the volume of two samples, X and Y, when placed in three containers of different volumes.
Volume of Samples
Volume of Container Volume of Sample X Volume of Sample Y
200 mL 200 mL 200 mL
500 mL 200 mL 500 mL
600 mL 200 mL 600 mL
Which of the following correctly describes the state of matter of one of the samples? (5 points)

a
Y is a gas because it has a definite volume.

b
X is a liquid because it has a definite volume.

c
Y is a liquid because it fills up the entire container.

d
X is a gas because it fills up the entire container.

Answers

X is a gas because it fills up the entire container
X because gas fills up an entire container, even if you can’t see it.

Write a 5-6 sentence summary answering the following questions:

- What do you already know about heating devices and ice storms?
- What do you wonder about heating devices and ice storms?

( no random answer or incorrect answers will be flagged)

Answers

Answer: ⬇

Explanation:

Heating devices help during an Ice Storm. Heat devices can be used to keep you warm and your family warm. Heating devices are used to also heat your house. Heating devices that run on electricity can also be no help if an Ice storm knocks out the power. Can heating devices run solar?Why aren't towns prepared enough during an Ice Storm?

Hello, Help please...?

Inspecting and monitoring cargo ships and planes for invasive species is cheaper than waiting for the species to establish and spread widely in its non-native environment before responding.
false
true

Answers

It is true for inspecting the cargo

What is an ellipse?
a circular orbit
an oval-shaped orbit
the center of gravity between orbiting objects

Answers

Explanation:

An eclipse is an astronomical event that occurs when an astronomical object or spacecraft is temporarily obscured, by passing into the shadow of another body or by having another body pass between it and the viewer.

I believe it is an oval shaped orbit. Hope this helps! :)

pleaseee help
science
ILL GIVE BRAINLEY IF CORRECT

Answers

Answer:

true

Explanation:

The answer is true codicia
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