Atoms of elements at the top of a group on the periodic table are smaller than the atoms of elements at the bottom of the group. How does this help explain the difference in the reactivity of metals within a group?

Answers

Answer 1

Answer: Well formation of metallic bond depends on free electrons.smaal sized atoms hold their electrons more firmly as compared to large size atoms ,this z due to distance of outer shell electrons by nucleus..in this way no of free electrons affect strength of metallic bond..smaal sized atoms release less free electrons..

Answer 2

Answer:

Answer:

Explanation:

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An object weighs 60.0 kg on the surface of the earth. How much does it weigh 4R from the surface? (5R from the center)

Answers

"60 kg" is not a weight. It's a mass, and it's always the same
no matter where the object goes.

The weight of the object is

   (mass) x (gravity in the place where the object is) .

On the surface of the Earth,

   Weight = (60 kg) x (9.8 m/s²)

      =    588 Newtons.

Now, the force of gravity varies as the inverse of the square of the distance from the center of the Earth.
On the surface, the distance from the center of the Earth is 1R.
So if you move out to 5R from the center, the gravity out there is

(1R/5R)² = (1/5)² = 1/25 = 0.04 of its value on the surface.

The object's weight would also be 0.04 of its weight on the surface.

   (0.04) x (588 Newtons) = 23.52 Newtons.

Again, the object's mass is still 60 kg out there.
___________________________________________

If you have a textbook, or handout material, or a lesson DVD,
or a teacher, or an on-line unit, that says the object "weighs"
60 kilograms, then you should be raising a holy stink.
You are being planted with sloppy, inaccurate, misleading
information, and it's going to be YOUR problem to UN-learn it later.
They owe you better material.

Answer:

23.5 N

Explanation:

Just wanted to clarify something about the verified answer: Our only given measurement—the mass of the object—has 3 significant digits, so we can only include 3 significant digits in our answer.

23.52 N is NOT the correct answer. Your answer should only have 3 significant digits.

I just did the quiz where this problem came from, so I know that 23.5 N is the correct answer.

What type of bond is formed if atoms donate electrons to other atoms when the elements are combined?

Answers

Ionic bond.

In the ionic bond one atom loses one or more electrons, leaving the atom with positive charge, and the other atom accepts those electrons standing with negative charge.

Which action is due to field forces?Select one of the options below as your answer: A. an apple falling from a tree B. a moving car stopping when the brakes are applied C. the rowing of a boat D. pushing a chair against the wall

Answers

Field force is when the force which you exert on prticular subject acts only on this subject, other subjects that sorround yours are not included, whereas the like gravity acts equally on everything. So the correct answer is D. pushing a chair against the wall.

Answer:

D. pushing a chair against the wall.

Explanation:

You own a high speed digital camera that can take a picture every 0.5 seconds. You decide to take a picture every 0.5 seconds of your physics teacher as she drops a watermelon off the top of the school. After you develop and analyze the pictures, you realize that the distance the watermelon falls from the teacher in each new picture isA) the same in each picture.
B) gradually less in each picture.
C) gradually more in each picture.
D) proportional to the mass of the watermelon.

Answers

-- There is no need to develop the pictures. They are available immediately in a digital camera.

-- There is no change in the teacher from one picture to the next.

-- The distance the watermelon falls from the teacher in each new picture is more in each picture than in the picture before it. (C)

What is the frequncy of a wave that has a speed of 8m/s and a wave length of 2?

Answers

v = f \times λ

v = 8m/s

λ = 2

f = v \div λ

f = 8 \div 2

f = 4hz

How is 1 hectoliter different from 1 kiloliter?

Answers

For this case the main unit is liter.

The first thing you should know is that the liter is a unit of volume.

The difference then between hectoliter and kiloliter is the conversion factor.

For hectoliter we have:

1 hectoliter = 100 liters

For kiloliter we have:

1 kiloliter = 1000 liters

Answer:

The difference between both is the conversion factor:

1 hectoliter = 100 liters

1 kiloliter = 1000 liters

a kiloliter is smaller than hectoliter

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