If an atom contains 11 protons and 12 neutrons, what is its atomic number?

11. Many metals are described as ductile, which means they can be O mixed with other metals to form alloys O hammered into a shape O drawn into a wire O broken apart with a sharp blow

ejercicio de ley de los gases Una muestra gaseosa tiene un volumen de 200cm^3 a 20C calcula el volumen a 0C si la presion se mantiene constante

Balance the reaction for the combustion of pentane:? C5H12+? O2→? CO2+? H2O Enter the four coefficients in order, separated by commas (e. G., 1,2,3,4), where 1 indicates the absence of a coefficient.

Oxidation of iron to form rust

What is the molar mass, in grams, of a mole of an element equal to? O A. the number of electrons in the element O B. the atomic weight of the element OC. the atomic number of the element OD. the number of neutrons in the element

How can the periodic table predict properties of elements?

Given that the pka for the imidazole ring of a histidine has a pKa of 6.5 how many histidine side chains will be charged at a pH of 7.2?

Choose the nonmetallic elements from the list. Check all that apply. A. yttrium B. oxygen C. boron D. polonium E. argon F. gallium G. carbon

How many grams of Tin (SN) would be required to use 6.9 moles of chlorine (cl2)

Identify the values that should be tested to see if a change occurs • x-values • y-values • h-values • z-values