Gallium is one of the few metals that can melt at room temperature. Its melting point is 29.768C. If you leave solid gallium in your car on an early summer morning when the temperature is 75.08F, what physical state is the gallium in when you return to your car and the interior car temperature is 85.08F

solid

Explanation:

If you were to leave the gallium in the interior of the car at those temperatures the gallium would still be in a solid physical state when you return. This is because the temperature in Fahrenheit when you return is 85.08F which converted to Celsius would equal 29.488C. This is close to Gallium's melting of 29.768C point but does not exceed it, meaning that it is close to melting but has not yet done so and is, therefore, still a solid.

3

explanation:

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.