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stiks02 [169]
3 years ago
13

0.0055 in scientific notation

Chemistry
2 answers:
Digiron [165]3 years ago
8 0

Answer:

5.5 x 10^-3

Explanation:

user100 [1]3 years ago
4 0

Answer:

5.5 × 10^-3

Explanation:

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If an element has an atomic number of 8 and an atomic mass number of 18, would it be an isotope? Why or why not?
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Answer:

It would be an isotope.

Background Information:

Isotopes are typically elements that have a different number of protons than neutrons. The atomic mass is the total number of protons and neutrons. The atomic number is the number of protons.

Explanation:

If the atomic number is the number of protons that means that this particular element has 8 protons. If the atomic mass is the total number of protons and neutrons then we can simply take away the amount of protons from that number, 18 - 8 = 10. If we take protons away from the number of protons and neutrons we are left with the number of neutrons. So there are 10 neutrons. Because there are 8 protons and 10 neutrons, or a different amount of neutrons and protons we know that this particular atom is an isotope.

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Use dimensional analysis.

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Then turn moles into atoms using Avogadro's constant.

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