Elements and Compounds

Compounds

Objectives

​6.5 The student will investigate and understand that all matter is composed of atoms.
c) elements may be represented by chemical symbols;

d) two or more atoms interact to form new substances, which are held together by electrical forces (bonds);

e) compounds may be represented by chemical formulas;

Instructions

Have fun!

​Listen carefully.
Take notes if that is how you learn best. Answer the questions based on what you heard or read.

butterfly

sunflower

eyeglasses

catfish

eggplant

​NaCl is like the words you just saw.
It is made from combining Na and Cl to form a new word NaCl.

Na and Cl = NaCl
Sodium + Chlorine = Salt

Made of 2 or more elements that have been
chemically bonded to form a new substance(s).

COMPOUND

The purest type of matter. Made of only 1 kind of atom.

ELEMENT

ELEMENT VS COMPOUND

Made of 2 or more elements that have been
chemically bonded to form a new substance (s).

COMPOUND

Made of 2 or more atoms that have been chemically bonded together.

COMPOUND VS MOLECULE

Molecule

If it is an
element,
then it can
be found on this list.

If it is not on
this list, it is not an element.

There are no
exceptions.

Compounds
are made by
chemically
combining 2
or more of these elements.

Drag and Drop

In the compound, H₂0, there are ​​ ​

Placeholder

atoms of H (hydrogen) and ​

Placeholder

atom of O (oxygen).

Drag these tiles and drop them in the correct blank above

2

1

3

4

Water is a compound made of 2 elements: O (oxygen) and H (hydrogen).

​2 hydrogen atoms and 1 oxygen atom

​Salt is a compound made from 1 atom of sodium and 1 atom of chlorine.

​2 elements: Na and Cl

Dropdown

H₂O and NaCl are both compounds because they are made from ​

Select answer

different ​

Select answer

chemically combined to form a​

Select answer

substance.

1 element

2 atoms of
1 element

Multiple Choice

O₂ is made of 2 atoms of the same element, so it is considered to be a(n) -

• molecule

• element

• compound

• pure substance

​The chemical bond takes place here with the electrons.

Dropdown

All of these are molecules made of 2 or more atoms. Some of these are also compounds, made of 2 or more elements. The compounds are ​ ​

Select answer

​ ​

Select answer

Categorize

Options (14)

C

He

Ar

NH₄NO₃

Al₂O₃

HCl

NH3.

O

Fe

H₂

O₂

NaCl

C₄

Co₇

All compounds are molecules but not all molecules are compounds.

Sort the elements into the element catagory and the molecules into the molecule catagory Put what is left into the compound catagory.

Element

Molecule

Compound