The atomic number of re is 75. the atomic mass of one of its isotopes is 186. how many neutrons are in an atom of this isotope?

a. 186

b. 111

c. 261

d. 75

When working with food, personal items such as a cell phone should be

What does the root word "atom" mean and why is that not an accurate name

What could you determine about a gold necklace that bubbles when it is exposed to an acid?

The first five ionization energies of an element are as follows (in kJ/mol) : 577.9, 1820, 2750, 11600, 14800. Which of the following elements is most likely to have these ionization energy values? a. Na b. Mg c. AI d. Si e. P

At 300K, the pressure inside a gas-filled container is 500 kPa. If the pressure inside decreases to 100 kPa, but the volume remains the same, what is the final temperature of the gas? Answers: A.) 240 K B.) 180 K C.) 30 K D.) 60 K

How many moles of lithium are in 83 grams of lithium?

Ocean constitutes most of ___ of water a) Evaporation b) Precipitation c) Condensation d) Transpiration e) Sublimation Don't choose a random letter.

In the reaction, Zn + HCl-> ZnCl2 + H2, 25 grams Zn are reacted with 17.5 grams HCl. How many grams of H2 will be produced? A. 0.382 g of H2 B. 0.479 g of H2 C. 0.7865 g of H2 D. 0.484 g of H2

Is nail varnish soluble?

What is the periodic trend for atomic size from top and bottom in a group? From left to right in a period?