2 years ago

Define the term compound

Chemistry

1 answer:

dalvyx [7]2 years ago

7 0

Answer:

A compound is a substance which contains two or more elements chemically combined together.

A compound is formed as a result of a chemical change.

Explanation:

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3 years ago

Write the nuclear equation to describe the alpha decay of 243 95 Am

motikmotik

Answer:

Here's what I get.

Explanation:

Your unbalanced nuclear equation is:

$_{95}^{243}\text{Am} \longrightarrow \, _{x}^{y}\text{Z} +\, _{2}^{4}\text{He}$

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.

Then

95 = x + 2, so x = 95 - 2 = 93

243 = y + 4, so y = 243 - 4 = 239

Element 93 is neptunium, so the nuclear equation becomes

$_{95}^{243}\text{Am} \longrightarrow \, _{93}^{239}\text{Np} + \, _{2}^{4}\text{He}$

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According to the vsepr model the arrangement of electron pairs around nh3 and ch4 is

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