Chemistry Test Study

metalloids are often

semiconductors

a compound is

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

Biochemistry is the study of

Chemistry of living things

a mixture is

a blend of any two or more kinds of matter, as long as each maintains its own unique properties

It is easy to determine whether a substance is a metal if the substance is

a good electrical and heat conductor

a solid substance is

always the same shape regardless of its container

a chemical is

any substance that has a definite composition

Plasma is the fourth state of matter. In the plasma state

atoms lose electrons

A nonmetal is usually

brittle

a nonmetal is usually

brittle

organic chemistry is the study of

carbon containing compounds

the study of matter and the changes it undergoes

chemistry

an intensive property of matter is

density

A state of matter in which a material has no definite shape but has a definite volume is the ____ state.

gas

The vertical columns on the periodic table are called

groups

the vertical columns on the periodic table are called

groups

The liquid state of matter can be described as

having a definite volume but not a definite shape

If a mixture is not uniform throughout, it is called

heterogeneous

If a mixture is uniform in composition, it is said to be

homogeneous

What happens to the energy in a substance when it changes state?

it changes form, but is neither destroyed nor increased

technological development often occurs

long after the basis research is complete

A measure of the quantity of matter is

mass

A true statement about mass is that

mass is determined by comparing the mass of an object with a set of standard masses that are part of a balance

Inorganic chemistry is the study of

non-carbon related compounds

All known chemical elements are organized into groups based on similar chemical properties in the

periodic chart

The horizontal rows on the periodic table are called

periods

a homogeneous mixture is also called

solution

Applied research is carried out in order to

solve a particular problem

The two most important properties of all matter are

taking up space and having mass

an atom is

the smallest unit of matter that maintains its chemical identity

Basic research is usually performed

to gain knowledge

Under ordinary conditions of temperature and pressure, the particles in a gas are

very far from one another

an extensive property of matter is

volume