8th Grade CBA #1 Review (Chemistry)

An element is a pure substance that cannot be broken down into simpler substances by chemical means. Each element is made up of atoms that have the same number of protons.

4 (Nitrogen, Hydrogen, Carbon, Oxygen)

Metals are typically good conductors of heat and electricity, malleable, ductile, and have a shiny appearance.

Metal

The Law of Conservation of Mass states that mass is neither created nor destroyed in a chemical reaction; the total mass of reactants equals the total mass of products.

24.3g

8

Density is the mass of an object divided by its volume, often expressed in grams per cubic centimeter (g/cm³).

The sand and rocks are more dense than water.

A chemical reaction is a process that leads to the transformation of one set of chemical substances to another.