I would say only grams here as the other two choices seem to have indications of directionality which would make them vectors.
Grams and seconds.
Units such as meters, seconds, kilograms, and kelvin are examples of units that can only describe scalar quantities. These units do not have a direction associated with them and only quantify the magnitude of a physical quantity.
Units such as kilograms, seconds, and degrees Celsius can only describe scalar quantities. These units represent values that have magnitude but no direction, unlike vector quantities which require both magnitude and direction for complete description.
Grams and seconds are two completely different units of measure. Grams measure weight and seconds measure time. Therefore, there is no way of telling whether one is smaller than the other. However, grams are smaller than kilograms and seconds are smaller than minutes. ;)
I would describe their weight in grams.
To determine the remaining amount of a 200 gram sample after 36 seconds with a half-life of 12 seconds, we first calculate how many half-lives fit into 36 seconds. There are three half-lives in 36 seconds (36 ÷ 12 = 3). Each half-life reduces the sample by half: after the first half-life, 100 grams remain; after the second, 50 grams; and after the third, 25 grams. Therefore, 25 grams of the sample would remain after 36 seconds.
grams
Mass is a measure of the amount of matter in an object. It is a scalar quantity, meaning it has magnitude but no direction. Mass is typically measured in units such as kilograms or grams.
grams
grams, kilogram.
grams
CGS units are the standard for the metric system; Centimetres, Grams, Seconds