U7 Review: The Nature of Matter

How many periods are there on the periodic table?

The equation for density is

Which is NOT a physical property?

A Lewis diagram of Helium would have how many electrons?

An atomic model of Magnesium would have how many electron shells?

A property only observed during a chemical reaction.

An element's group determines an atoms number of 

An atom that has gained or lost electrons to fill its valence shell is called

The Kinetic Molecular Theory states that all matter is

A characteristic of matter that changes when the size of the sample changes.

Density is a _____________ physical property.

Who came up with the idea of valence?

A molecule is the smallest part of a _______________ that retains its characteristics

Chlorine has how many neutrons?

Who discovered the electron?

Who came up with the Atomic Theory of Matter?

Ice changing directly to a gas is

Who discovered the Proton?

Color is a 

All group 6 elements have

The force that needs to be broken to change a liquid into a gas

Helium inside a balloon is a 

Who wrote the first textbook on chemistry?

The Law of Conservation of Mass states that the mass of the reactants must equal the mass of 

Nitrogen has how many valence electrons?

When two or more elements are blended without combining chemically, you have a

Beach sand is a _____________.

A characteristic of matter not changed by the amount of the sample

What is Sodium's atomic number?

A characteristic observed with the senses and not changing the substance

Oxygen has how many electrons?

How many groups are there on the periodic table?

A property that indicates how a substance will react with another

A substance stays at the melting point until the whole sample has melted due to the

What scientist first came up with the concept of an Atom?

When was the electron discovered?

An element's period tells you the number of an atom's

Mass is an _______________ physical property

Lithium will form what kind of ion?

Flourine has how many valence shells?

NaCl is a _____________________

Neon's atomic symbol is

Milk is a ___________________ mixture

Does not form a new substance

The temperature at which a liquid turns to a gas.

Who proposed that electrons orbited the nucleus in energy shells?

The rounded atomic mass tells us the element's most common

Who discovered the neutron?

An atom that varies in its number of neutrons is called a/an

What part of an atom can never change?