Which of the following electron configurations for neutral atoms is correct?

magnesium: 1s22s22p63s23p6

argon: 1s22s22p63s23p6

A solution is saturated in both nitrogen gas (N2) and potassium chloride (KCl) at 75°C. What happens when the solution is cooled to room temperature?

What are the vertical columns on a periodic table called

If your front lawn is 18.0 feet wide and 20.0 feet long. And each square foot of lawn accumulates 1450 new snow flakes every minute, how much snow (in kilograms) accumulates on your lawn per hour? Assume an avarage snow flake has a mass of 1.90 mg

Which term describes a trace, print, or remain of an organism preserved over time in a rock? A. skeleton B. fossil C. mineral D. sedimentary rock

What structural units make up network solids?

When K-37 undergoes positron emission, what is the resulting atom? A) K-37 B) K-38 C) Ar-37 D) Ar-38

Consider the following reaction where Kp = 4.55*10-5 at 723 K: N2 (g) + 3H2 (g) ⇋ 2NH3 (g) a) If the three gases are mixed in a rigid container at 723 K so that the partial pressure of each gas is initially one atm, what will happen?

Which terms are used to identify pure substances? (1) an element and a mixture (2) an element and a compound (3) a solution and a mixture (4) a solution and a compound

Which of the following polyatomic ions will form an ionic compound with two sodium ions? CO32- HCO31- NO21- NO31-

What is hybridisation