5 2 points
Which of these elements have 3 valence electrons?
In
1
AL
Si
2
As
N
3
4
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5

How many moles are in 7.2 x 10^23 carbon molecules? (*round to the nearest hundredth and include the unit "mol c" after your number) question 6 options:

Which atom or ion is the largest? a. k b. k+ c. ca d. ca2+ e. li

An observation that requires measurement is called quantitative observable or qualitative