It’s appearance
It’s physical form
What it feels like
How hot it gets
If it melts
Shape
Color
The element has 83 electrons
1/5 + 1/4 =1/x
4x + 5x = 20
9x = 20
x = 2.22 hours Answer
There are 3 sig figs. 8 and 2 are obvious. The ending 0 is significant because it is at the end of a decimal number, and doesn't have to be measured.
