What is a front? an air mass formed when cold air moves away from warm air the boundary between a warm air mass and a cold air mass the leading edge of a warm air mass the direction in which a rainstorm is moving

A radioactive nuclide is used to detect eye tumors. An atom of this radionuclide contains 15 protons, 15 electrons, and 17 neutrons. Which is symbol of this radionuclide? Superscript 32 subscript 17 upper P Superscript 17 subscript 15 upper P.

Write the name and symbol of the ion formed when a potassium atom loses one electron

What differentiates one element from another

Suppose 6.87 g of sulfuric acid is mixed with 9.7 g of sodium hydroxide. Calculate the maximum mass of sodium sulfate that could be produced by the chemical reaction. Be sure your answer has the correct number of significant digits.

Argon-39 has a half-life of 269 years. How long will it take for 52.5 g of a 60.0 g sample to decay to its daughter isotope?

A column is filled with four different liquids of different densities. A red liquid, a blue liquid, a green liquid, and a purple liquid are all added into the column. This chart shows the densities of the liquids.

Metals are used in many products because of the characteristic properties that most metals have. Which product requires the high luster of metals in order to work?

Sodium is a silvery-white metal that reacts with chlorine gas, which is a yellow-greenish gas that is toxic. The reaction gives off a lot of heat.

Which of the following chemical reactions is an oxidation-reduction reaction? Answer WO3 + 3H2 W + 3H2O KNO3 + LiCl LiNO3 + KCl CaSO4 + 2NaCl Na2SO4 + CaCl2 Mg (NO3) 2 + 2HBr MgBr2 + 2HNO3 According to the collision theory and model created to

Describe how a physical property such as a mass or texture can change without causing a change in the substance