Which element has chemical properties that are most similar to the chemical properties of sodium?

(1) Mg (3) Se

(2) K (4) Cl

What is an Isolated Atom?

The atomic mass is important because

What is the combustibility of matter?

How can an unsaturated solution of a solid be made saturated?

During a laboratory activity, a student combined two solutions. In the laboratory report, the student wrote "A yellow color appeared." The statement represents the student's recorded (1) conclusion (3) hypothesis (2) observation (4) inference

What percentage of the naphthalene molecules emitted a photon?

In an endothermic reaction, heat is absorbed from the surroundings. How does this affect entropy? A. The particles in the surroundings move slower and have decreased entropy. B.

The temperature of a sample of liquid water changes from 50°C to 30°C. Which statement best explains the change that must happen at the molecular level? A. The molecules move more quickly and their average kinetic energy increases. B.

The most important reason why solid sodium hydroxide is not used as a primary standard is

plate a and plate b are both continental plates. what is ghe most likely result if the two plates collide?