Are alkaline earth elements metals or metalloids?

What is the electronegativity in the determination of the ionic or covalent character of a bond

Why is the electron configuration for copper 1s22s22p63s23p63d104s1 instead of 1s22s22p63s23p63d94s2? A filled sublevel is more stable than a half-filled sublevel. The arrangement of electrons with the same spin is as small as possible.

Formation of a lipid bilayer is energetically favorable. how does this arrangement result in higher entropy for the system, and thus make bilayer formation energetically favorable? select one: a. fatty acid tails are highly saturated and flexible. b.

The half-life of a certain isotope is 1 day. At the end of 3 days, how much of the isotope remains? 1/16, 1/8, noneof it, 1/3, none above The half-life of a certain isotope is 30 seconds. How much of a 200 g sample will remain after 2 minutes? 50, 6.

Density of 0.740 g/ml. if you have 328 grams volume in milliliters?

What problems must be overcome before fusion can be used to produce energy? A. synthesizing deuterium and tritium and containing the plasma reactants B. achieving high temperatures and containing the plasma reactants C.

A 50 W engine generates 50 J of energy. How long did it run for? A. 10 s B. 1 s C. 5 s D. 100 s

What is the mass (grams) of 9.89 * 10^24 moles of (cho30h) ?

Which of these elements is unlikely to have a reaction with any element or compound? rubidium (Rb) magnesium (Mg) cobalt (Co) argon (Ar)

Select the single best answer. which of these factors influence buffer capacity? conjugate acid-base pair concentration of buffer components buffer range ph of the buffer pka of the acid component