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MatroZZZ [7]
2 years ago
7

Question 1 of 15

Chemistry
1 answer:
blondinia [14]2 years ago
3 0

Answer:

Chemical nomenclature

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Hat is the oxidation state of each element in the compound CaSO4? Include + or - in your answers as appropriate.
quester [9]
As per the rule, oxidation number of alkaline earth metals in their compounds is +2. Oxidation number of oxygen in it's compounds is -2(except peroxides) and the sum of oxidation numbers of all the elements of a neutral compound is zero.
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2 years ago
Which elements have the most similar chemical properties?
Mumz [18]

Answer: K and Na

Explanation:

Potassium and Sodium have a chemical symbol of K and Na respectively.

They have similar chemical properties because both

- have only one valence electron,

- form univalent positive ion when they donate their lone outermost electron as shown below

Na --> Na+ + e-

K --> K+ + e-

- are good reducing agents

- react with cold water vigorously to liberate hydrogen gas and form alkalis, so they are known as alkali metals.

- K and Na are placed in Group 1 of the periodic table.

Thus, unlike the other pairs given, K and Na, have the most similar chemical properties

6 0
3 years ago
Two or more different elements chemically combine to form compounds.<br><br> True or false
vodomira [7]

Answer:

true

Explanation:

8 0
2 years ago
Decide whether the property measured was a chemical or physical property of X, if you can. If you don’t have enough information
olga nikolaevna [1]

Answer:

<u><em>See attachment for explanations.</em></u>

Explanation:

3 0
1 year ago
Is volume and mass size-dependent
Otrada [13]
A size dependent property is a physical property that changes when the size of an object changes.
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