Whatare the 20 element

Explanation:

Atomic Number ElementSymbol

Chlorine. Cl

Argon. Ar

Potassium. K

Calcium. Ca

if its the 20 elements of chemistry then

Explanation: hydrogen, helium, lithium, beryllium, boron, carbon, nitrogen, oxygen, fluorine, neon, sodium, magnesium, aluminum, silicon,

phosphorus, sulfer, chlorine, argon, potassium, calcium

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b) mutualism

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the density of gold = 19.3 g/cm3

the relation between density and mass and volume is

density = mass / volume

given :

mass of gold = 13 g

density = 13g / volume = 19.3

volume = 13 /19.3 = 0.67 cm^3

thus volume of gold nugget = 0.67 cm^3