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Lubov Fominskaja [6]
3 years ago
10

What element is this? how do you know?

Biology
1 answer:
Kitty [74]3 years ago
5 0

Answer:

Helium

Explanation:

We know that this atom has two positive particles on the nucleus (protons) with two neutral particles (neutrons). We can also see that it hass two electrons on the orbitals. Knowing this, we can say that the element is Helium.

Helium has a relative atomic mass of 4 and it's atomic number is 2. The atomic number is equal to the number of protons and electrons the atom has, and the atomic mass can be used to calculate the number of neutrons:

Relative atomic mass = Neutrons + atomic number

So we know that:

Neutrons = relative atomic mass - atomic number

Neutrons = 4 - 2 = 2.

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I am 100% sure it's 1.) Faults.

Explanation:

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7 0
2 years ago
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Darwin thought that significant evolution was much too slow to be witnessed in a human lifetime. recent experiments by biologist
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Significant evolution, in Darwin's opinion, moves much too slowly to be seen in a person's lifetime. Recent biological tests have demonstrated that some populations may develop extremely quickly, with significant changes happening over many generations in the lab.

What role does Darwin's theory of evolution play?

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6 0
1 year ago
Why do we add isopropyl alcohol to the tube of DNA, and what is the result?
Vilka [71]

Answer:

To achieve precipitation of the DNA.

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7 0
3 years ago
\Which of the following is not a property associated with all living organisms?
Arlecino [84]

Answer:

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3 0
3 years ago
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AlekseyPX
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8 0
3 years ago
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