The term used to describe the composition of an igneous rock rich in the elements magnesium and iron is

Which of the following elements could form a diatomic molecule? A. gold B. argon C. fluorine D. magnesium

You begin with a 50 g chunk of ice. Calculate the amount of heat needed to change this ice into50 g of steam.

The concentration of ionic substances is important for the heart to beat. Your heart responds to electrical impulses that travel through heart cells that are made up mostly of water.

3 During a flame test, a lithium salt produces a characteristic red flame. This red color is produced when electrons in excited lithium atoms (1) are lost by the atoms (2) are gained by the atoms (3) return to lower energy states within the atoms

Topographic map are a type of road map? True or false

As you move across the period on the periodic table what pattern can be described about the electron configurations?

Where are metalloids used in everyday life?

What aspect of Bohr's original model of election stucture is no longer considered valid in the currently accepted theory of electron structure

Which topic is commonly used to explain activation energy and how chemical reactions happen A. reaction rate B. Collision theory C. Velocity distribution D. Spontaneous reaction

Calculate the density of a rectangular solid that has a mass of 25.71 g, and its dimensions are 2.3 x 4.01 x 1.82 cm.