The rate of chemical changes (how fast they occur) can depend on several factors. What are two factors that can influence the rate of a chemical change? Explain how these factors might affect chemical changes.

I am a solid at room temperature, have 3 valence electrons and I make foil. What am I?

Oxygen combined with what element makes a 1:1 ratio?

Which statement explains how the bands in the crystal of a metal are like atomic orbitals? They both have localized electrons that orbit specific atoms. They both involve ionization of some atoms so bonding can occur.

3. What subatomic particle did J. Thompson discover?

Which of the following is a soft metal in the lightest element that is a solid at standard temperature and pressure? A) lithium B) silicon C) silica D) cobalt

Hemoglobin, the oxygen-carrying protein in red blood cells, has four iron atoms per molecules ad contains 0.340 percent iron by mass. calculate the molar mass of hemoglobin

Nancy wants to find out how the steepness of a hill's slope affects the amount of soil that erodes from it. She has soil, a long pan, and a pile of books with which to build a model hillside. She has a watering can to model rainfall.

Elements on the periodic table are arranged by increasing?

What is the difference between molecular formula and molecular model

The average kinetic energy of the atoms that make up a substance which is changing from a liquid to a solid is