An atom has atomic number 92 and mass number 238. Which of these is an isotope

of this atom?

a. 235U

92

b. 238Th

91

c. 92Nb

41

d. 92X

235

Jennifer is learning the parts of the cell and knows that there must be a structure responsible for maintaining the homeostasis of the cell. This structure is which of the following? A. cell membrane B. Nucleus C. Chloroplast

What part of the periodic table tells you the number of protons found in the nucleus of the atom of that element?

If a gas is measured to have a pressure of 1.2 atm at 227 K, and its origina temperature was 199 K, find its original pressure if volume remains unchanged.

What is the formula for aluminum bromide?

What do the formulas for table salt, NaCl, and water, H2O indicate about the compounds?

Which of the following examples illustrates an object with kinetic energy?

A Chemist measured 184 mL using a graduated cylinder. Based on her experience, the volume did not seem to be correct.

What is the mass of a 1.00cm3 piece of iron having a density of 7.90g/cm3

When repeated measurements of the same quantity are very close to one another they are

A beaker has a mass of 77.275 calculate this mass in mg