Chemistry vocab

Basic unit of matter

what holds the nucleus together

positive charged subatomic particles

neutrally charges subatomic particles

negatively charged subatomic particles

the center of an atom that holds protons and neutrons

Multiple layers that contain the electrons

number of protons in an element

rounded number of protons and neutrons

outer shell of the electron cloud

atom or molecule that has a charge

atoms of the same element that have a different number of neutrons

chemically unique atoms and molecules

different atoms or molecules in the same space that are not chemically bonded together

has all the same atoms or all the same molecules

two or more atoms that conjoin chemically, bond

two molecules that contain at least two different elements

pure chemical substances that can not be broken down into other substances

Noble gasses

2 8 8

Matter cant be created or broken apart

anything that occupies space and has mass

Changes that create a new substance and chemical bonds are created/destroyed

changes in appearance, but a new substance is not created and chemical bonds are not created/destroyed

Burning/fire, explosions, color change, odor change, bubbles/fizz, and temperature without heating/cooling

when matter changes from one state to another

sodium bicarbonate (baking soda)- sodium, hydrogen, carbon, oxygen 3

Acetic Acid (vinegar)-carbon, hydrogen 3, carbon, oxygen, oxygen, hydrogen

Carbon Dioxide- carbon, oxygen 2

Dihydrogen Monoxide (water)-Hydrogen 2, oxygen

Sodium Acetate- carbon, hydrogen 3, carbon, oxygen, oxygen, sodium

All compounds are molecules but all molecules are not compounds

there are the same number of atoms of elements before and after the reaction

When different symbols have no spaces in between