4Al (s) + 3O2 (g) __> 2Al2O3 (s)

Give the number of significant figures 7.110g

Which term describes the preserved remains or traces of animals, plants, or other organisms from long ago? A. cast B. fragment C. artifact D. fossil

How did Niels Bohr describe electrons in his atomic model A. Their energies can have any values B. Their exact positions cannot be known C. They have high probability to be found in certain regions D. They orbit the central nucleus in discrete paths

P. ermanent hardness of water can be removed by what? ( a. adding slaked lime. ( b. boiling. ( c. adding caustic soda. ( d. filtration

Which statement is true regarding a hydrogen bond? Question 8 options: It is weaker than dipole interaction forces It is weaker than London dispersion forces It is strong because of the lack of inner electrons shells in a hydrogen atom It is

What type of reaction is sodium reacting with chlorine

1. If temperature is increased, the number of collisions per second

1. Tonic Bonds are a. Formed when a metal and nonmetal transfer electrons b. Formed when a nonmetal and nonmetal share electrons Formed when a metal forms || bonds with other like atoms d. Formed when noble gases lose electrons

Why does the sun appear to be the brightest star in the sky? A - Its apparent brightness is much greater than other stars. B - It burns more gas, making it brighter than any other star.

What effect does nuclear radiation have on atoms? It splits atoms. It burns atoms. It ionizes atoms.