You have a balance that can measure mass to the nearest gram. Which measurement is written with the correct amount of precision?
A. 0.1 g
B. 11 g
C. 11.1 g
D. 11.12 g

B. 11 g

Explanation:

When we want to express a value in decimal number, we can do it in several ways.

For example, if something weighs 7.827 grams, we can write it as following:

- to the nearest gram (no decimal number): 8g

- to the nearest 0.1 grams (one decimal): 7.8g

- to the nearest 0.01 grams (two decimals): 7.83g

to the nearest 0.001 grams (three decimals: 7.827g

Basically, we simply round the number to the adequate decimals.

If we are asked to rouund a value to the nearest gram (or meter, second, centimeter etc.) we need to round it to a whole number, without decimals.

In this particular case, only answer B. meets the condition.

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.