Two different isotopes of the same element have : (t/f)

- Equal nuclear charges

- Similar radioactive decay properties

- Equal mass of an atom

- Different number of neutrons

- Equal mass of a nucleus

Draw a structural formula of the sr configuration of the compound shown below.

Which formula represents a nonpolar molecule containing polar covalent bonds? (1) H2O (3) NH3 (2) CCl4 (4) H2

The water molecule for questions 1-4, write true or false on the line provided. 1. water is a polar molecule. 2. hydrogen bonds are an example of adhesion. 3. covalent bonds give water a low heat capacity. 4.

Bases have a pH of a. more than 7 b. less than 7 c. 7

The process in which rock fragments freeze to the bottom of a glacier and then are carried away when the glacier moves is called

How many experimental trials are needed before a hypothesis can be accepted as true?

The type of bonding that involves a transfer of electrons is

Calculate the molar mass of NH4NO3.

Thirty grams of lead oxide and fifteen grams of ammonia react completely to produce solid lead, nitrogen gas, and liquid water. What will be approximate mass of all three products? 10 g 15 g 45 g 450 g

The smallest unit of charge is - 1.6*10-19 C, which is the charge in coulombs of a single electron. Robert Millikan was able to measure the charge on small droplets of oil by suspending them between a pair of electrically charged plates.