In your own words, explain the periodic law.

The most common isotope of chromium has a mass number of 52. which notation represent a different isotope of chromium?

What volume of h2 (g) at 27oc and 680 torr is produced by the reaction of 15.0 g al metal with excess hcl (aq) to produce alcl3 and h2 (hint: you may want to write and balance an equation first) ?

To measure a specific volume of a gas, you must have a (n) a. scale. b. open container. c. closed container. d. open or closed container depending on the type

A small cubical furnace 50 by 50 by 50 cm on the inside is constructed of fireclay brick [k = 1.04 W/m. degree C] with a wall thickness of 10 cm. The inside of the furnace is maintained at 500 degree C, and the outside is maintained at 50 degree C.

The element 1s2 2s2 2p6 3s2 3p6 represents which noble gas

How many moles of water (h2o) are present in a beaker containing 45.9 g h2o?

Name four elements that have properties similar to chlorine

Which of the following is an element? A. CO2 B. H2O C. Xy D. Na

Wny do we use the unit light years

What "Desconposition" mean?