(4) total number of valence electrons, because they exist in the same group.
Answer:
false
true
true
Explanation:
false - changing the hypothesis to meet your needs is not a good researcher
true - when you can further analyze and explain then you have a successful experiment even if it's not what you expected
true - successful experiments do not end there. they can lead to more in depth questions.
<span>Releasing the oxygen from
the mercury does not change the mass. If you started with 20 g total
you would still have 20 g total after the heating</span>
Calcium has the least attraction for electrons in a chemical bond