Which of the following Group 2 elements has the lowest first ionization energy?

(1) Be (3) Ca

(2) Mg (4) Ba

What is a material that attracts iron or materials containing iron

Identify the group of elements that correspond to the following generalized electron configuration: [noble gas]ns^2 (n-1) d^2

Why carbon nanotubes are ao strong?

What mass of Al2O3 (alumina, a finely divided white powder that is produced as billows of white smoke) is formed in the reaction of 2800 kg of aluminum?

For each item: classify organic or inorganic. NaCl:. phenol (C6H6; O) :. C2H6:. Ca3 (PO4) 2:. formaldehyde (CH20) :. MgCO3:.

Is it safe to take 450mg of Diphenhydramine Hydrochloride?

Which energy source produces carbon dioxide? a. plutonium b. uranium c. sunlight d. natural gas

Substance A and B are colorless, odorless liquids that are nonconductors and flammable. The density of substance A is 0.97 g/mL; the density of substance B is 0.89 g/mL. Are A and B the same substance? Explain your answer.

Describe what what food web is.

What are quarks and gluons made of?