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2 years ago

An atom is electrically neutral when...

Chemistry

1 answer:

Charra [1.4K]2 years ago

3 0

Answer:

The number of protons and electrons are equal.

Explanation:

When an atom has an equal number of electrons and protons, it has an equal number of negative electric charges (the electrons) and positive electric charges (the protons). The total electric charge of the atom is therefore zero and the atom is said to be neutral.

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3 years ago

Read 2 more answers

4. The mass of a silver liberty (coin) was measured three times and each measurement was made

Vaselesa [24]

Answer:

The average mass of the gold coin reported to five significant figures, even though you had to divide by "3" to obtain the average.

Explanation:

Given that,

The mass of a silver liberty was measured three times and each measurement was made to five digits.

The mass values are,

$m_{1}=12.519\ g$

$m_{2}=12.521\ g$

$m_{3}=12.496\ g$

The average mass of the gold coin is 12.512 g.

We know that,

Significant figures :

Significant figures is explained the nonzero, leading zero and zeros between two nonzero digits.

For example,

The digits is 0.003405

In the digit, 345 = nonzero

0.00 = leading zero

The average mass of the gold coin reported to five significant figures because average mass is 12,512. All digits are nonzero.

Nonzero digit are significant.

Hence, The average mass of the gold coin reported to five significant figures, even though you had to divide by "3" to obtain the average.

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3 years ago