Which of the following is an example of using creativity while trying to explore scientific questions? Thinking of various research topics
Using trial-and-error methods
Using accurate and precise measurements
Selecting appropriate laboratory equipment

the density(ratio between mass and volume as m/v) decreases from top to bottom in periodic table group as the size increases and nuclear charge decreases. but in periods density increases from left to right as atom size decreases and nuclear charge increases.

i believe the answer is 5,000