Chemistry chap 1

Organic chemistry is the study of

carbon containing compounds

_________ is an example of a chemical change.

changing color

A solid substance is

always the same shape regardless of its container

A chemical can be defined as

any substance that has a definite composition.

A team of scientists is working to discover how an enzyme affects blood cells in sheep. They are working in the field of _____________.

biochemistry

Matter includes all of the following except

light

Which of the following is an example of a homogeneous mixture?

air

The horizontal rows on the periodic table are called

periods

_______________ is performed to better our quality of life.

Technological Development

Iron and sulfur, when heated, form an iron sulfide that has different properties from either iron or sulfur. The formation of iron sulfide is an example of a ____________ change.

chemical

Which of the following is an example of an intensive property?

density

____________ is a pure substance that cannot be broken down and made of only one type of atom.

element

Gravel is an example of a(n) _____________ mixture.

heterogenous

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

it changes form, but is neither destroyed nor increased

Which of the following is not a chemical change

melting

Iron and sulfur, when heated, form an iron sulfide that has different properties from either iron or sulfur. The formation of iron sulfide is an example of the ____________ in this reaction.

products

The oxygen in the air causes iron to rust. Iron and oxygen are ______________ in the process and rust is the product.

reactants

Metalloids are often

semiconductors

A homogeneous mixture is also called

solution

Applied research is carried out in order to

solve a particular problem

analytical chemistry

the identification of the components and composition of materials

inorganic compounds

the study non-organic substances

physical chemistry

the study of the properties and changes of matter and their relation to energy

theoretical chemistry

the use of mathematics and computers to understand the principles behind observed chemical behavior