How are elements arranged in the Periodic Table?

A.

by their properties

B.

alphabetically

C.

by how much they are worth

D.

in the order they were discovered

Which phrase describes the charge and mass of a neutron? 1. a charge of + 1 and no mass 2. a charge of + 1 and an approximate mass of 1 u 3. no charge and no mass 4. no charge and an approximate mass of 1 u

Which piece of technology allowed scientists too look for life on mars?

What is the volume of silver metal will weigh exactly 2500.0g. The density of silver is 10.5g/cm3 - centimeters cubed-

A solution with a ph of 11 is first tested with phenolpthalein

Determining missing genotypes

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.

When the metal sample reacts with acid, the gas evolved will be collected over water; the gas is said to be "wet".

Solid iron (II) sulfide reacts with aqueous hydrochloric acid HCl to produce hydrogen sulfide gas H2S and aqueous iron (II) chloride.