Ch 3 Earth Science

All elements are classified and arranged according to their chemical properties in the ________________.

process of change from a liquid to a gas at temperatures below the boiling point is called ______________.

A ____________ is composed of two or more atoms held together by covalent bonds.

A(n)_______ produces hydrogen ions in water, while a __________ produces hydroxide ions in water.

a substance that is composed of atoms of two or more different elements that are chemically combined.

The area surrounding the nucleus where electrons are found to be in constant motion.

Atoms of the same element that have different mass numbers are called _________________.

Electrons are distributed over one or more ____________________ in a predictable pattern.

The number of protons in an atom’s nucleus is its ______________________.

A polar molecule has a slightly positive end and a slightly negative end.

The ____________ is based on the amount of hydrogen ions in a solution.

When a solid absorb enough thermal energy to cause their orderly internal crystalline arrangement to break down and melt

The slow change of state from a solid to a gas without an intermediate liquid state is called _________.

If an element has an atomic number of 56, then it has 56 ________________________.

This particle has no net charge, it is considered neutral.

A __________________ is the force that holds together the elements in a compound.

Another name for a homogeneous mixture is __________.

In _____ the positive ions of the metal are held together by the attraction to the negative electrons moving among them

When writing a chemical reaction, what must you always check before leaving it alone?

Like matter, energy cannot be created or destroyed, but it can be changed from one form to another.

When a mixture’s components are easily recognizable, it is called a _______________?

The attraction of two atoms for a shared pair of electrons that holds the atoms together is called a ___________

The change of one or more compounds into other compounds is called a ______________.

hot, highly ionized, electrically conducting gases are called _____________.

Elements with a full outermost energy level are known to be highly ________________.

_________ is a solid that consists of densely packed atoms arranged randomly.

When a gas is cooled to the boiling point, it releases thermal energy and becomes a liquid in a process called ____

_________________ is anything that has volume and mass.

____________________ are the basic building blocks of all matter.

In radioactive decay, a nucleus can lose protons and neutrons, change proton to neutron, or change a neutron to a proton

An _______________ is a substance that cannot be broken down into simpler substances by physical or chemical means.

An _____________ is the attractive force between two ions of opposite charge.

Liquids take the shape of the container they are placed in, and they do have a definite volume.

The temperature at which liquids solidify is called the ____________.

The nucleus of an atom is composed of _________ and _____________.

Which of the following is not a component of an atom?

atom that gains or loses one or more electrons from its outermost energy level has a net electric charge and is called?

Mixing oil and water creates a homogeneous mixture.

Molecules held together by covalent bonds that do not share electons equally are known as _________.

The fundamental fact that matter cannot be created or destroyed is called the ___________.

When the the component particles cannot be distinguished, even though they still retain their original properties its a?

This particle has a positive charge.

The electrons in the outermost energy level, called _________ determine the chemical behavior of different elements.

If an atom has an outermost energy level that is LESS THAN HALF FULL, that atom will tend to ___________ electrons.

The most important polar molecule that we need for survival is?

The sum of the protons and the neutrons in an atom’s nucleus is its _________________.

Most solids are ____________ because the particles of a solid are arranged in regular geometric patterns.

This particle has a negative charge.

Solid, liquid, gas, and plasma are the four states of ___________ in the universe.