A single atom of an element has 21 nutrons 20 electtons and 20 protons which element is it

What type of bonding occurs in a sample of pure barium, Ba? In other words, how is one barium atom held to another barium atom?

What molecule makes up more than half of the human body

Select the three characteristics that best describe a STEM-educated student. Innovative Understanding Curious Traditional Logical Dependent

How many moles of nitrogen, n, are in 90.0 g of nitrous oxide, n2o?

8. True or false: Half-life is half the time it takes for a radioactive sample to completely decay.

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?