Earth Science (check answers)

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1. The mass number of an atom is obtained by totaling the number of_____and____.

a. electrons and protons
b. electron and neutrons
c.protons and neutrons
d.neutrons and isotopes

Is it B?

2. Which of the following statements about the chemical combinations of atoms to form compounds is NOT true. a. compounds form when atoms are more stable in a combined form.
b. when atoms combine,they gain, lose, or share electrons.
c. when atoms combine,they are at lower energy state.
d. compounds form when atoms are less stable in a combined form.

Is it C?

  • Earth Science (check answers) -

    1. NO! it is not B
    The atomic number is number of protons.
    The atomic mass is protons plus neutrons.
    The mass of electrons is tiny in comparison
    2. If they were less stable in combined form why would they combine?

  • Earth Science (check answers) -

    Damon no it would be A my Aunt is a scientist

  • Earth Science (check answers) -

    That's what Damon said. By the way, he's a retired physics professor from MIT.

    Please read more carefully before you post answers here, Sophya.

  • Earth Science (check answers) -

    Yes, what I said agrees with her aunt luckily. Although my undergraduate degree is in physics my doctorate is in engineering and I was an engineering professor at MIT :)

  • Earth Science (check answers) -

    A is true, and I am sure that is what her aunt said. However the question is what is NOT true.

  • Earth Science (check answers) -

    I dont know about you... BUT! Just cause you say you're a retired professor doesn't mean you are, not that I am saying you're not and that you are wrong. You might be who you say you are. But now that I am looking at the dates you're messages were send I am having second thoughts, are you sure you're not the same person?

  • Earth Science (check answers) -

    the whole test answers 1-13

  • Earth Science (check answers) -

    I have 20 questions tho...

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