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3 years ago

What is the difference between an Isotope and an Allotrope?

1 answer:

8 0

Allotropes are elements on the periodic table that have more than one crystalline form . There are three forms of the element carbon : Diamond, Graphite, and Fullerenes. Isotopes are atoms of the same element with the same atomic number but have a different mass number.

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Iron filings were mixed together with salt crystals. What unique property of iron would be BEST to separate the filings from the

Sedaia [141]

Iron has magnetic properties, so you would just need to hold a magnet over the mixture and the filings will come right out.

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3 years ago

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Create a story and describe the motion (in meters) of an object that has traveled a distance but has no displacement. Need Help

vekshin1

Answer:

One complete revolution around a circular path.

Explanation:

Let us take the case of a car moving in a circular track of radius r metres.

In one revolution, the car covers the length(distance) equal to the perimeter of the circle.

In this case, distance traveled = 2 $\pi$ r metres

But after one complete revolution, the car reaches the same position as it was at the beginning of the motion.

Hence, the initial and final points coincide or the car hasn't changed it's position w.r.t the initial point.

So in this case, the displacement is zero.

Hence, revolution of a car around a circular path is an example of an object traveling a distance but having no displacement.

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3 years ago

Mixtures two or more substances that are mixed together but are not chemically combined the substance in a mixture each keep the

sergey [27]

The answer is D, concrete

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3 years ago

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Which of the following is NOT a reason why chemical bonds are important? *

KengaRu [80]

Answer:

the answer would be B :)

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3 years ago

The table compares some characteristics of two atoms.

Mademuasel [1]

Answer:

Explanation:

Atom X,

Neutron num = 4, Mass num = 7

Therefore, proton number = Mass num - Neutron num

= 7 - 4

= 3

Atom Y,

Neutron num = 5, Mass num = 9

Therefore, proton number = Mass num - Neutron num

= 9 - 5

= 4

1) False. Atom X belongs to group 3 while atom Y belongs to group 4

2) False. Atom X is in a column on the left of Atom Y

3) True. Atom X and atom Y belong to the same period two on the periodic table

4) Fasle. Atom X and Y are not isotopes because they do not have the same atomic number.

Isotopy is a phenomenon whereby atom of same element have same atomic number but different mass number

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3 years ago