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Which element would have a full outer shell of electrons if it gained three electrons?

boron
lithium
nitrogen
argon THIS ONE

Which statement best explains why hydrogen's atomic number is equal to its mass?

hydrogen is in the first row and the first column of the periodic table
hydrogen has one electron and one proton. THIS ONE
hydrogen does not have any neutrons
hydrogen is stable with two electrons in its outer shell

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6 answers

  1. …..anyways this is for the test “the periodic table unit test”

    1. A mental can be hammered into thin sheets and nonmetals are brittle

    2. C vanadium

    3. C silicon

    4. B hydrogen does not have neutron

    5. B francium has few valence electrons but they are in a higher energy level

    6. A.
    protons = 31
    neutron = 39
    electron = 28

    7. C isotopes that are naturally occurring and unstable always exist in trace amount

    8. C atomic number

    9. B electrons move freely in curved paths around the nucleus

    10. A low energy alpha particles passing through a field of high mass number particles

    11. C on the right side of the periodic table

    12. A nitrogen

    13. A fluorine , chlorine , and iodine

    14. C an ionic bond is likely because they will want to give away two valence electrons in order to become stable

    15. D -2

    16. The change in atomic number from 10 to 11
    implies a change from a noble gas to a highly
    reactive group 1 element. As a result of this,
    reactivity increases. The atomic number of an element tells us the group to which the element belongs in the
    periodic table. An atomic number of 10 shows a filled outermost shell which is characteristic of the noble gases. Hence, as we move from this atomic number of
    10 to an atomic number of 11, reactivity increases
    positively. Atomic number 11 corresponds to a highly

    17. The periodic table shows a correlation between the strength of the ionic connection and the position of the elements on the table. Because metals are positively charged and non-metals are negatively charged, if you start on the left side of the periodic table and work your way right, the ionic charge and radius will gradually decrease and the charge will lessen.
    To clarify, oxygen is a nonmetal with a little negative charge, whereas lithium is a metal with a positive charge

    (although i don’t encourage y’all to cheat, i also know school is hard and useless since we will all forget this after the test anyway and yes these answers are all correct I just took the test :) good luck and have a good day AND ALSO copy and paste ur correct answers at the end of ur tests for any subject so u can help other ppl like i’m helping u rn :)

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  2. to the person who copied n pasted all of it bless 🙏 if u got snap n ur tryna find someone to work w / get answers off of add me @sarahk_90211 , i need someone taking chem or algebra 2 to work w so ik im not completely lost

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  3. You can make it easier to answer questions if you number them AND label the answers.
    1. It can't be Ar. That already has 8 electrons in its outer shell. You want something with 5 electrons in the outer shell so that 3 more will make 8. That is nitrogen. It has 2 electrons in the first shell and 5 and the second.
    2.There aren't any GREAT answers. b is more or less correct and c is more or less correct but neither are exactly correct. I would call b a better answer than c if only one can be chosen. The real problem I have is that the atomic number of hydrogen is NOT the same as the mass of hydrogen. It IS the same as the mass NUMBER. Perhaps that is just a typo. Then ithe correct answer is c and b is not correct. I suspect there is a typo here and the question should be "Why is the atomic number of hydrogen equal to the mass number of hydrogen?"

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  4. The answer is for sure B

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  5. You are a wonderful person I love you queen thank you sooo muchhh!!

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  6. gl with school work bois

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