What physical properties help us identify and classify materials?

Physical properties is that is value a state of the describes that physical system.

Explanation:

Physical property is that perform physical system can be used to the momentary and to referred the physical quantity.

Physical property is to contain that they are not model property and often to the extensive and intensive property they are process not combined.Physical property is to produced to the intensive property is not depend on size and the system or extensive property is to the show all the relationship.Physical property is to the direction and property to the spatial observations.Physical property is the interception to the reflective property to the surface of the light and its called secondary.Physical property is to the similar way in the atomic structure, property to the underline the atomic structure to the quantum structure.Physical property is to contain the object to used to the classical mechanics, to the optical and electrical property.Physical property is the many way to produced :- area, color, density,  distribution, electric change, hardness , length, opacity, and strength.

the catch is that the top numbers are atomic masses the bottom numbers are the numbers of protons and electrons in an uncharged atom. they are the number of that atoms as you would find them on the periodic table. further, the numbers on the left are used to determine the missing numbers on the right

so here we go

atomic mass

239 + 1 = y + 134 + 3 combine like terms

240 = y + 137             subtract 137 from both terms

240 - 137 = y

103 = y

atomic number

94 = z +54 + 0

94 = z + 54               subtract 54 from both sides.

40 = z

answer