Whats the atomic mass

All the isotopes of a given atom have (1) the same mass number and the same atomic number (2) the same mass number but different atomic numbers (3) different mass numbers but the same atomic number (4) different mass numbers and different atomic

Is quartz (SiO2) a substance or mixture?

Insulin, adrenaline, and estrogen are examples of

What type of compound does the chemical name, phosphorous pentachloride, represent? a. ionic salt b. covalent molecule

Is Naci a metal or none metel

A population of crabs live on a light-colored sandy beach. In this environment there is a population of birds that eat the crabs. One year, there is a volcanic eruption near the beach and dark volcanic ash covers the beach.

It would take one light year to travel to the sun? True or false?

A specific, electrically neutral atom of boron has 5 protons, 5 electrons, and 6 neutrons. what is the mass number of this atom of boron? 6 5 11 16

When does hail happen?

For the reaction, calculate how many moles of the product form when 0.012 mol of O2 completely reacts. Assume that there is more than enough of the other reactant. 4Al (s) + 3O2 (g) →2Al2O3 (s) Express your answer using two significant figures.