Which list includes only physical properties
density, reactivity, and conductivity
boiling point, conductivity, and color
color, odor, and flammability
flammability, reactivity, and ductility

The list that include only the physical properties are: BOILING POINTS, CONDUCTIVITY AND COLOUR.

Physical properties are those properties of matter which can be observed and quantified without changing the composition of the material. Examples of physical properties are boiling point, melting points, electrical conductivity, colour, ductility, malleability, odour, density, solubility, polarity, texture, appearance, luster, hardness, etc.

because u need two or more forms of the same element that contain equal numbers of protons but different numbers of neutrons in their nuclei to form isotopes.

so since they all have the same shape? i mean maybe because m& m and reeses are both chocolates

the ideal gas law equation is as follows

pv = nrt

where p - pressure

v - volume

n - number of moles

r - universal gas constant

t - temperature

so if the pressure, volume and temperature are already known

we are left with n and r

since r is the universal gas constant that has a known fixed value then r too is known

so we are left with 'n'

once we know temperature volume and pressure

we can find the number of moles of gas present using the ideal gas law equation

this is not my own answer, this is an answer for the same question by the user blahblahmali. i do not claim ownership of this account.