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NISA [10]
3 years ago
5

Nonliving things have cells. True False

Chemistry
2 answers:
IgorC [24]3 years ago
4 0

Answer:

false

Explanation:

Whitepunk [10]3 years ago
3 0
The answer is false.
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Explain the difference between rotation and revolution.
aleksandrvk [35]

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Rotation: spins on its axis

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Explanation:

The Earth rotates on its axis, while it revolves around the sun.

The moon revolves around the Earth.

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How is an isotope different from the standard form of a chemical element?
velikii [3]

Answer:

  • The standard form of a chemical element is the natural mixture of several isotopes of the same element, which is atoms with the same number of protons but different number of neutrons, while an isotope is a particular kind of atom with a definite number of neutrons.

Explanation:

A <em>chemical element</em> is a pure substance formed by atoms with the same atomic number (number of protons). This is because it is the number of protons what identifies an element.

For example: oxygen is a chemical element, so oxygen is formed by only atoms of oxygen, and the atomic number of those atoms is 8, because every oxygen atom has 8 protons.

Nevertheless, some atoms of oxygen, may have different number of neutrons. Isotopes are different kind of atoms of the same element, which only differ in the number of neutrons. So, some atoms of oxygen will have 8 neutrons, other 9 neutrons, and other 10 neutrons (those are the stable isotopes of oxygen).

That difference in neutrons, is generally accepted that, does not modifiy substantially the chemical properties of the element, but the mass number. So, the isotopes with more neutrons wil be heavier, and the isotopes with less neutrons will be lighter.

  • Mass number = number of protons + number of neutrons.

In general a chemical element is formed by a mixutre of isotopes of the same element.

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3 years ago
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The orbit closest to the nucleus has ___________ energy.
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inonic bonds with cavalent bonds

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ionic bonds

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