What is true about the metals in group 1A, 2A, 3A?

a) all form ions with negative charges

b) all have ions with a 1 + charge

c) gain electrons when they form ions

d) lose electrons when they form ions

What is time actually

A rock can be broken down into different kinds of substances by physical processes. No chemical reactions are needed to separate different parts of a rock into pure substances. This is because a rock is a (n).

Which term best describes the stored energy based on the position or chemical composition of an object? a. kinetic energy b. potential energy c. activation energy d. thermodynamic energy

a student filled a graduated cylinder to 7.4 ml, then adds a handful of pebbles. after the pebbles are added, the graduated cylinder water level reads as 8.2 ml. calculate the volume of the pebbles

The number of daughter cells that reault feom meiosis 1 is

When is Ksp determined for a system?

What is the average surface temperature of Uranus

Consider the following statements. A. Molecules of hot water have less kinetic energy than those of cold water. B. For most solids, solubility increases when temperature increases. C.

Which describes the fourth state of matter known as plasma? A It is a liquid containing nuclei and electrons. B It is a gas containing nuclei and electrons. C It is a liquid containing electrons created by fusion.

The process of using dna to produce complementary rna molecules is called