8th Grade Science 1st 9 Week SG

In an electrically neutral atom of any element, there are equal numbers of

• protons and neutrons.

• electrons and protons.

• electrons and neutrons.

• atomic number and atomic mass.

Physical or Chemical change: Baking a Cake

• Physical

• Chemical

Solid

• The ability for one substance to dissolve into another

• A form of matter that has a definite shape and volume

• A subatomic particle that has a positive charge and that is found in the nucleus of an atom

Products

• Number of Protons + Number of Neutrons

• A pure substance made of only one kind of atom

• Ending materials in a chemical reaction.

Metalloids

• Elements that have properties of both metals and nonmetals; border the dark zig zag line

• A substance made up of atoms of two or more different elements joined by chemical bonds

• A region that is located at the center of an atom and contains most of the atom's mass

Elements in the same group or family have the same...

• Number of protons

• Number of neutrons

• Number of valence electrons

• Atomic Mass

Physical property, ability to bend or be molded

• Malleability

• Amorphous

• Metalloids

• Odor

What is contained in the Nucleus?

• Neutrons & Electrons

• Neutrons & Protons

• Protons & Electrons

• Barney

The number of electrons in the outer shell

• Valence Electron

• Reactant

• Electron Cloud

Amorphous means

• Solid with random structure, like plastic or butter

• The ability for one substance to dissolve into another

• Celsius

• Same as vaporization point