CHEMISTRY HIGH SCHOOL

Which of the following statements about subatomic particles best characterizes electrons? A positive charge, light, circling the nucleusB no charge, heavy, found in nucleusC negative charge, light, circling the nucleus D negative charge, heavy, circling the nucleus

Answers

Answer 1
Answer: Every electron carries one elementary negative charge.  Concerning mass,
it takes roughly 1,840 electrons to make enough mass for 1 proton or 1 neutron.
Electrons don't necessarily have to stay connected to an atom, but when they do,
they circle the nucleus.

So you should select (C): ==> Negative, ==> light, ==> circling the nucleus.
Answer 2
Answer: The answer should be (C) negative charge,  light and circling the nucleus.

Why? ---- An electron always has negative charge. Its mass is 1/ 1900 times the mass of proton and it circles the nucleus.

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How many oxygen atoms are in the compound Al2O3?

Answers

As you know, the symbol of the Oxygen is "O"
And in a compound's empirical formula (In this case Al2O3), the number after each Symbol is how much atoms of this kind there is.

So, There is 3 Oxygens atoms in the Aluminium Oxide Al2O3

Hope this Helps :)

In amino acid "valine", the terminal groups attach with what atom?

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