The word atom comes from the Greek atomos which means indivisible, indivisible (excepted in the nuclear reactions). It was therefore perfectly suited to the concept of atom when it was developed by chemists in the early nineteenth century, ie as the smallest part of a pure body.
So the atom of aluminum will remain unchanged, whatever the reaction it will undergo, it is only its molecular form that will change.
Answer:
<h2><em>A. Neutron</em></h2>
Explanation:
Neutrons and protons are found in the nucleus of an atom. BUT unlike Protons <em>(Positive charge/ P an P is how I remember it) </em>or Electrons, which have a <em>negative charge,</em> Neutrons have zero charge which means they are neutral particles. <em>(Neutral an Neutron both start with N.)</em>
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Good luck.
<em>Lb.</em>
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Answer:
2.05mg Fe/ g sample
Explanation:
In all chemical extractions you lose analyte. Recovery standards are a way to know how many analyte you lose.
In the problem you recover 3.5mg Fe / 1.0101g sample: <em>3.465mg Fe / g sample. </em>As real concentration of the standard is 4.0 mg / g of sample the percent of recovery extraction is:
3.465 / 4×100 = <em>86,6%</em>
As the recovery of your sample was 1.7mg Fe / 0.9582g, the Iron present in your sample is:
1.7mg Fe / 0.9582g sample× (100/86.6) = <em>2.05mg Fe / g sample</em>
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I hope it helps!
Its on Google..."The group number of a representative element in the periodic table is related to the number of valence electrons it has. ... Elements of the halogen family lose one electron to become halide ions."
Answer:
Explanation:
The volume of the Sun is so huge that it could hold over 1 million Earths. The Sun is a typical star, and is also the star that is nearest to the Earth. It is composed of a mixture of 73% hydrogen, 25% helium, and 2% other elements by weight.
