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Lelu [443]
3 years ago
9

What do all substances in the universe have in common?

Chemistry
1 answer:
Dmitry [639]3 years ago
7 0

Answer:

All are made of matter

Explanation:

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3 years ago
Chemistry an atom of strontium has at least four different isotopes. what is different between an isotope of 86sr and an isotope
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Isotopes are atoms of the same element that differ in the number of neutrons.

Remember that all the atoms of an element have the same number of protons. So the only difference between isotopes of an element is the number of neutrons.

86 Sr means that the mass number of this isotope is 86. Also, remember that the mass number is the number of protons plus the number of neutrons.

87 Sr means that the mass number of this isotope is 87.

So, 86 Sr and 87 Sr differ 1 neutron.

Answer: 1 neutron


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