Ec - activities
bryanna
bl195552
mastery assess it_5 school year > week 18 > day 87
target due: 1/29/20
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materials
1. a scientist counts 5.62 x 1024 molecules of nacl. how many moles of nacl are in the sample? show your work in
space below.
8.16 moles
11.33 moles
9.33 moles
10.5 moles

oxygen, selenium, tellurium, and polonium.

they're all from the same group as sulfur (group 16).

the seeing the electronic configuration we can say that the element is fluorine.

fluorine is the most electronegative element in the periodic table.

but by only seeing the configuration we cannot say about its reactivity because we don't know if its configuration after excitation or by addition of electrons.

but if not then, it is the lightest halogen and exists as a highly toxic pale yellow diatomic gas at standard conditions. as the most electronegative element, it is extremely reactive: almost all other elements, including some noble gases, form compounds with fluorine.