Environmental systems
true/false
6.
a significant digit provides information about the number.
7.
leading zeros are always significant.
a number other than zero is always significant.
9.
when rounding a number, express it as an exact value.
10.
when rounding to a certain place, look at the number after that place.

frequency, z, and the collision density, z, in carbon dioxide (co2), r 180 pm at 30 °c and 120 kpa

1 is the answer to this problem

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.