What elemental trend exists in each row as we move from left to right on the periodic table?

Number of protons decreases

Number of protons increases

Chemical reactivity of metals increases

Chemical reactivity of nonmetals decreases

Which form of energy relies on gravitational potential energy

What are three ways to measure the amount of something chemistry?

Newton's law of universal gravitation, the law of conservation of mass, the law of superposition, and the laws of thermodynamics are all examples of scientific laws because A. they have been approved and accepted by congress. B.

What is the value of a in the following nuclear reaction? 238 92u→234 90th azx

The density of gold is 19.32 g/cm3. what is the volume of a sample of gold that has a mass of 54.82 g?

Lithium and nitrogen react in a combination reaction to produce lithium nitride: 6Li (s) + N2 (g) → 2Li3N (s) How many moles of lithium are needed to produce 0.60 mol of Li3N when the reaction is carried out in the presence of excess nitrogen?

7. Convert 5.2 cm of magnesium (Mg) ribbon to mm of Mg ribbon.

If you place a crystal substance on a tabletop, return to view it after some time passes, and find it as a powdered substance, which of the following processes most likely took effect? A. Efflorescence B. Distillation

What changes occur in the nuclei of atoms involved in the reactions that fuel nuclear power plants?

Calculate the molar mass for HCN. 0.2703 g/mol 2.703 g/mol 27.03 g/mol 270.3 g/mol