Question

question 5
which analogy best describes how electrons behave in an atom?
people standing still in a line
cars parked in a garage
riders swinging around a central post
coins inside a vending machine
question 6
a atom has 7 protons. if the atom has a net charge of 0, how many electrons does the atom have?
8
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Explanation:

Step1: Understand the charge of protons and electrons

Protons have a positive charge (\(+1\)) and electrons have a negative charge (\(-1\)).

Step2: Use the net - charge formula

The net charge of an atom is given by \(Net\ charge=Number\ of\ protons\times(+ 1)+Number\ of\ electrons\times(-1)\). Let the number of electrons be \(x\). We know the number of protons \(n_p = 7\) and net charge \(Q = 0\).
So, \(Q=7\times(+1)+x\times(-1)\)
Substitute \(Q = 0\) into the equation:
\(0=7 - x\)

Step3: Solve for \(x\)

Add \(x\) to both sides of the equation \(0 = 7−x\):
\(x=7\)

Answer:

7