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Mila [183]
3 years ago
13

Atoms have a blank shape. the blank of an atom is made up of

Chemistry
2 answers:
timurjin [86]3 years ago
7 0

<em>Answer:</em>

  • The atom has spherical shape. The nucleus of an atom is made up of protons and neutrons.

<em>Explanation:</em>

  • The shape of an atom depend upon many factors including angular momentum of electrons and electrostatic forces between particles. So mostly the shape of an atom is complex , however in simplest of atoms have spherical shapes.
  • The atom consist of three fundamental particle like protons, neutron and electrons. Proton and neutron are collectively form the nucleus of an atom while electrons revolve around the nucleus.
vodka [1.7K]3 years ago
4 0

complete question:

Atoms have a blank shape. The nucleus of an atom is made up of blank that have a positive charge and blank that have no blank.

Answer:

Atoms have a spherical shape. The nucleus of an atom is made up of proton that have a positive charge and neutron that have no charge. The

Explanation:

Atoms are the fundamental unit of matter that defines the structure of an element. Atoms are the basic unit that makes up an element. Atom consist of proton, neutron and electron.

The atom is regarded as been spherical in shape but it has no defined edges. The nucleus of an atom is where the proton and the neutron of an atom resides. The electron is found at the outer part of an atom. It is known to revolve around the atom.

The proton of an atom is positively charged while the neutron has no charge. The proton and the neutron of an atom contributes immensely to the mass of an atom. In fact it determines the mass of an atom.

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Explanation:

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A single penny has a mass of 2.5 g. Abbie and James each measure the mass of a penny multiple times. Which statement about these
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The question is missing the data sets.

This is the complete question:

A single penny has a mass of 2.5 g. Abbie and James each measure the mass of a penny multiple times. Which statement about these data sets is true? 

O Abbie's measurements are both more accurate and more precise than James'.

O Abbie's measurements are more accurate, but less precise, than James'. 

O Abbie's measurements are more precise, but less accurate, than James'. 

O Abbie’s measurements are both less accurate and less precise than James'. 

Penny masses (g)

Abbie’s data                                        

2.5, 2.4, 2.3, 2.4, 2.5, 2.6, 2.6 

James’ data


2.4, 3.0, 3.3, 2.2, 2.9, 3.8, 2.9

Answer: first option, Abbie's measurements are both more accurate and more precise than James'.

Explanation:


1) To answer this question, you first must understand the difference between precision and accuracy.

<span>Accuracy is how close the data are to the true or accepted value.
</span>

<span>Precision is how close are the data among them, this is the reproducibility of the values.</span>

Then, you can measure the accuracy by comparing the means (averages) with the actual mass of a penny 2.5 g.

And you measure the precision by comparing a measure of spread, as it can be the standard deviation.

2) These are the calculations:

Abbie’s data                      
                 
Average: ∑ of the values / number of values 

Average = [2.5 + 2.4 + 2.3 + 2.4 + 2.5 + 2.6 + 2.6 ] / 7 = 2.47 ≈ 2.5

Standard deviation: √  [ ∑ (x - mean)² / (n - 1) ] = 0.11


James’ data


Average = [2.4 + 3.0 + 3.3 + 2.2 + 2.9 + 3.8 + 2.9] / 7 = 2.56 ≈ 2.6


Standard deviation = 0.53

3) Conclusions:

1) The average of Abbie's data are closer to the accepted value 2.5g, so they are more accurate.

2) The standard deviation of Abbie's data is smaller than that of Jame's data, so the Abbie's data are more precise.
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What changed about the peppered moth population during the second industrial revolution
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Answer:

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