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3 years ago

Explain how atoms of elements form molecules, compounds and mixtures.

1 answer:

katrin2010 [14]3 years ago

6 0

An element is composed of millions of atoms and a compound is composed of molecules. When an atom reacts with another atom, a molecule is formed.

For example, if sodium reacts with chloride, it forms sodium chloride (Common salt). Here, sodium and chloride are elements and sodium chloride is a molecule. In this way, millions of atoms of sodium reacts with chloride and forms common salt.

Again, when the common salt is mixed with other compounds such as water, it forms a mixture.

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You drop a rock down a well that is 5.4 m deep. How long does it take the rock to hit the bottom of the well?

Natali5045456 [20]

Equation of motion:

$y_{f}=y_{o}+v_{o}t+ \frac{1}{2} at^{2}$

Since initial velocity is zero, the second term goes away:

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$\frac{2(5.4m) }{9.81 \frac{m}{ s^{2} } } = t^{2}$

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<u><em> $t = 1.05s$ </em></u>

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Answer:

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