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borishaifa [10]
3 years ago
13

Some scientists blame

Biology
1 answer:
alisha [4.7K]3 years ago
5 0

Answer:

A warmer tropical oceans

Explanation:

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In the polyatomic ion tco4-, tc has a hypothetical charge of 7+. the 99tc isotope is used in medicine for imaging purposes. it h
vladimir1956 [14]

Answer;

Atomic number Tc = 43 , which is equivalent to the number of protons in nucleus.

Number neutrons = mass number - number of protons = 99 - 43 = 56 neutrons .

Number of electrons = number of protons - charge = 43 - (+7) = 36 electrons

Explanation;

-Atomic number is the number of proton in the nucleus of an atom of a given element. Mass number is the total number of protons and neutrons in the nucleus of an atom. A neutral atom has equal number of protons and neutrons.

-Isotopes are atoms of the same element with the same atomic number but different mass number.

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Your answer is true my friend.Good luck
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