How can i indentified by the atomic number?

In two or more complete sentences, explain how to calculate the amount of energy that is transferred when 150 g of cooper cools from 63.0 °C to 21.0 °C. Is the energy absorbed or released? The specific heat of copper is 0.387 J/g*°C.

Explain why the quantum number set (3,3,-2, + 1/2) is not possible for an electron in a ground-state atom

6. Identify each element as a metal, metalloid, or nonmetal a. gold b. silicon C. sulfur d. barium

Loudness is expressed in

Which compound is produced when HCl (aq) is neutralized by Ca (OH) 2 (aq) ? (1) CaCl2 (3) HClO (2) CaH2 (4) HClO2

When magma intrudes parallel to another rock layer, the formation is called a (n) A. sill. B. dike. C. extrusion. D. unconformity.

What is the net amount of energy released when 1 mole of H2O is produced

Why is Sn (SO4) 2 named Tin (IV) Sulfate and not Tin (II) Sulfate?

An element x forms an iodide (xi3) and a chloride (xcl3). the iodide is quantitatively converted to the chloride when it is heated in a stream of chlorine: 2xi3+3cl2â2xcl3+3i2 if 0.5500 g of xi3 is treated, 0.2596 g of xcl3 is obtained.

When you kick a soccer ball across a field it will eventually come to a stop. Does this prove or disprove Newton's first law of motion? It disproves Newton's first law of motion because gravity is stronger than friction.