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2 years ago

Look at this word equation

2 answers:

7 0

Hi :)

a. the reactants are zinc and copper oxide
b. the products are zinc oxide and copper
c. the elements are zinc, oxygen, and copper
d. the compounds are copper oxide and zinc oxide

hope this helps.

alexandr1967 [171]2 years ago

6 0

A. Zinc + copper oxide.
They are reacting with each other therefore called the “reactants”

B. Zinc oxide + copper
They are the product of the reaction, therefore called products

C. Zinc, copper and oxygen
Those are w the single elements on the periodic table

D. Copper oxide, zinc oxide
Those are compounds that have combined to form a bond with an element other than their own. (For this level of chemistry)

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3 years ago

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3 years ago

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Use the periodic table to determine what element cesium-135 () becomes after beta decay.

bonufazy [111]

Answer:

D. $_{56}^{135}\text{Ba}$

Explanation:

Your unbalanced nuclear equation is

$_{55}^{135}\text{Cs} \longrightarrow ? + _{-1}^{0}\text{e}$

It is convenient to replace the question mark by an atomic symbol, $_{x}^{y}\text{Z}$ , where x = the atomic number, y = the mass number, and Z = the symbol of the element .

Then your equation becomes

$_{55}^{135}\text{Cs} \longrightarrow _{x}^{y}\text{Z} + _{-1}^{0}\text {e}$

The main point to remember in balancing nuclear equations is that the sums of the superscripts and the subscripts must be the same on each side of the equation.

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3 years ago

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