Two highly reactive elements in period 2 of the periodic table are the metal lithium and the ... ?

a. Metalloid arsenic

b. Krypton

c selenium

d. fluorine

What is th leading cause of type 2 diabetes?

The age of fossils can sometimes be determined by radiometric dating, which is based on the constant rate of decay of radioactive isotopes. the time required for half of a radioactive isotope to decay is called the half-life of that isotope.

According to the atomists, the entire physical world was made of:

Under appropriate conditions, nitrogen and hydrogen undergo a combination reaction to yield ammonia: N 2 (g) 3H 2 (g) 2NH3 (g) If the reaction yield is 87.5%, how many moles of N 2 are needed to produce 3.00 mol of NH 3

Phosphoric acid can be prepared by reaction of sulfuric acid with "phosphate rock" according to the equation:ca3 (po4) 2 + 3h2so4 → 3caso4 + 2h3po4 suppose the reaction is carried out starting with 125 g of ca3 (po4) 2 and 75.0 g of h2so4.

32 Which electron configuration represents the electrons in an atom of Ga in an excited state? (I) 2-8-17-3 (3) 2-8-18-3 (2) 2-8-17-4 (4) 2-8-18-4

Why do you think that the particles of a suspension settle out but the particles of a colloid do not

A solution that is 33.6 % by mass of phenol (C6H5OH) in water is prepared. What is the mole fraction of the phenol?

Describe the law of conservation of momentum

14. What steps should you take to keep parents and the public from viewing your personal information on social networks?