Which element has an atomic number 10 and an atomic mass of 20

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?