The mass of an electron is

(1) equal to the mass of a proton

(2) equal to the mass of a neutron

(3) greater than the mass of a proton

(4) less than the mass of a neutron

Scientists can make atoms of large elements which have not been previously known. Identify an element that would have similar properties to an atom that has 118 protons.

The law of universal gravitation was discovered by.

2. A calibration curve requires the preparation of a set of known concentrations of CV, which are usually prepared by dieting a stock solution whose concentration is known. Describe how to prepare 10.

Which element has the fewest valence electrons available for bonding? A. iodine B. aluminum C. carbon D. nitrogen

Which of the following is NOT a chemical reaction? a. ice melts from water b. ammonia breaks up into nitrogen and hydrogen c. hydrogen and oxygen combine to make water

How many covalent bonds can each carbon atom form?

Hich element is likely to be the most brittle? a. selenium b. cobalt c. platinum d. zinc

What units should they have used in order to make the correct conversion

The brown solid that formed is zinc copper oxygen iron

a solution is approximately 332.0 g of salt per kilogram of solution. Assume this salt is all NaCl. What is the molality of this solution?