Elements and Compounds

Which of the following measurements would be a reasonable guess for the diameter of a gold atom?

3×10−10 m

Which of the following is TRUE about heterogeneous mixtures?

A heterogeneous mixture is not uniform in composition. A heterogeneous mixture is not a pure substance.

Which of the following is an element?

Carbon

an element

Elements consist of only one kind of atom. Compounds and mixtures consist of more than one type of atom. A pure substance is either an element or a compound, so it could consist of one type of atom, but it does not have to.

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

Maple syrup is an example of a homogenous mixture.

Which of the following statements is true about the relationship between atoms and molecules? Select all that apply.

Molecules are made of two or more atoms that are bonded together. Molecules may consist of one type of atom, or multiple types of atoms.

atom

The atom is the smallest unit of an element.

molecule, which is always comprised of multiple atoms.

Water

Which of the following is NOT a substance made of one type of molecule.

a cell within the human body

Which of the following terms describes the smallest particle of a substance that still retains the chemical properties of that substance? Select all that apply.

a mixture a molecule

The smallest unit of matter that is indivisible without utilizing a nuclear reaction is known as:

an atom

Which of the following can only consist of only one kind of atom?

an element

Which of the following are considered pure substances? Select all that apply.

an element a compound

What is the smallest particle that an element can be divided into?

atom

The elements hydrogen (H) and oxygen (O) combine to create hydrogen peroxide (H2O2), which is a pure substance that can only be broken down by chemical means. Hydrogen peroxide is BEST defined as a(n) _______________.

compound

A homogenous mixture varies from a heterogenous mixture in that a homogenous mixture has properties that:

do not vary in the mixture

an element a compound

element and a compound are both considered to be pure substances. Elemental iron, for example, contains only iron atoms. Pure water, which is a compound, contains only water molecules, and nothing else.

What are arranged on the periodic table?

elements

A mixture can be made up of two or more:

elements compounds pure substances

Mixtures can be classified as homogenous or __________

heterogenous

Which of the following is a molecule?

water

Which of the following is a molecule?

water ozone glucose

A substance that cannot be broken down into a simpler form by ordinary chemical means is known as:

an element

A(n) ________ is a substance that contains more than one type of atom.

compound

Which of the following gases do NOT exist as a collection of individual atoms?

hydrogen

A __________ contains more than one type of element or compound.

mixture

What is the result of two or more atoms forming chemical bonds with each other?

molecule/compound

The characteristics of atoms are responsible for the following aspects of a type of matter, EXCEPT:

monetary value

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

photon

Which is NOT one of the components of matter that was believed in by the ancients?

plasma water earth fire plasma The other three, as well as air, were believed to be the primary components of matter by the ancients.

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

salad dressing

A homogeneous mixture is also known as a:

solution

Which of the following is a mixture?

sugar water