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Mars2501 [29]
3 years ago
8

The diagram shows a ball that is dropped and allowed to bounce.

Chemistry
2 answers:
grin007 [14]3 years ago
6 0

Answer:

B and D

Explanation:

GalinKa [24]3 years ago
3 0
B and C because its going up
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Iodine 131, cesium 137, and strontium 90 are all considered isotopes. What are isotopes?
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Answer:

Isotopes are variants of an element, where the number of neutrons is different but its number of protons stay the same.

Explanation:

If the number of protons had changed then it would just be a different element.

Electron number changing simply adds charge to the atom, and doesn't change it or anything.

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2 years ago
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Salt is an ionic compount. it​
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Explanation:

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Table salt is an example of an ionic compound. Sodium and chlorine ions come together to form sodium chloride, or NaCl. The sodium atom in this compound loses an electron to become Na+, while the chlorine atom gains an electron to become Cl-

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CO2 is an element. True False
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Answer:False

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3 years ago
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Write the reaction when solid aluminum sulfate is put into water:
valentina_108 [34]
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Which two elements are in the same period?A. hydrogen (H) and neon (Ne)B. tin (Sn) and antimony (Sb)C. fluorine (F) and chlorine
ArbitrLikvidat [17]

Answer:

C. fluorine (F) and chlorine (Cl)

D. arsenic (As) and antimony (Sb)

Explanation:

In the periodic table , all the elements are arranged according to the atomic number ,

and the elements are placed in groups and periods ,

The elements with similar chemical and physical properties are placed in a common group .

The elements present in the same group have the same number of valence electrons in the valence shell  .

Hence , from the given options ,

fluorine (F) and chlorine (Cl)  belongs to group 17 with 7 valence electrons in the outermost shell .

arsenic (As) and antimony (Sb) belong to group 15 with 3 valence electrons in the outermost shell .

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