Test : Elements and Compounds

     Carbon is considered an element, while carbon dioxide is considered a compound. This is because carbon dioxide is –

•      a gas at room temperature

•      given off by green plants

•      made of two different element

•      useful to human being

   Compounds are different than elements because compounds are

•      combinations of two or more elements

•     made from the same type of atoms

•     not able to be broken down into parts

•      a pure substance; elements are not

     Which of the following is the simplest form of substance?

• Solution

• Element

• Compound

• Mixture

    Which of the following statements describes an element?

•     It contains only one kind of atom

•     It is composed of atoms of two or more elements that bond together

•      It can be decomposed by ordinary chemical means

•      It has unique properties that are different from the properties of its individual elements

    What elements made up the compound Carbon dioxide?

•     Carbon and Oxide

•     Carbon and Hydrogen

•     Carbon and Oxygen

•      Carbon and Carbon

   A simplified form of matter which cannot be decomposed by ordinary chemical means

•    Compound

•      Elements

•     pure substance

•     all of the above

     The most abundant element in Earth’s crust and water

• Oxygen

• Helium

• Carbon

• Gas

     Commonly called salt, is one of the best preservatives.

• Sodium Chloride

• nitrogen

• sodium ascorbate

• carbon dioxide

    Form of matter that cannot be separated into two different species by any physical means

• Compounds

• Elements

• Pure substance

• All of the above

   What is the difference between a compound and an element

•     Compounds are made up of elements and can be chemically separated. Elements cannot be separated

•    Elements are found on the periodic table and compounds are found on the dining room table

•     Elements make up compounds. Elements can be separated but compounds cannot be separated

• None of the above