Holly's quiz 1

What is matter?

The quantity of matter contained in a substance describes

What is the unit of mass?

The force that an object exerts under gravity describes

A _____ is the smallest particle of a compound possessing characteristics of the compound

_________ are materials that have a definite and constant composition

Substances are made up of

___________ are simple substances that cannot be broken down

How many naturally occurring elements are there?

What is the smallest piece of an element?

____________ are complex substances with two or more elements

What is the smallest piece of a compound and give an example?

The ancient Greeks believed in

Who was the first person to separate the elements based on mass and when?

Who developed the periodic table of elements and organized them by ascending mass and chemical properties?

Who theorized that there was a small dense nucleus surrounded by a cloud of electrons and when?

Who theorized that an atom was arranged like a solar system, a dense nucleus surrounded by electrons in distinct orbits and when?