Unit 1 Notes - Elements and Compounds

Elements & Compounds Notes

Unit 1

Multiple Choice

Which of the following is an example of an ELEMENT?

• Water - H2O

• Salt - NaCl

• Neon - Ne

• Methane - CH4

Multiple Choice

Which of the following is an example of a COMPOUND?

• Cobalt - Co

• Ammonia - NH3

• Carbon - C

• Lithium - Li2

Match

Match the following vocabulary

• Atom

• Molecule

• Element

• Compound

The smallest part of a chemical element

2 or more atoms held together by a chemical bond

A pure substance represented by a chemical symbol

2 or more elements combined chemically

• The smallest part of a chemical element

• 2 or more atoms held together by a chemical bond

• A pure substance represented by a chemical symbol

• 2 or more elements combined chemically

Multiple Choice

1. Which of the following is a chemical compound and why?

• Al, because it has a chemical symbol with one element

• Al, because it is a chemical formula with more than one element

• H2O, because it has a chemical symbol with one element

• H2O, because it is a chemical formula with more than one element

Multiple Choice

2. Which of the following examples most closely represents what it means to be an element?

• A gumball machine with many different colors and sizes of candy inside.

• A fish tank holding a large variety of fish.

• A salad made of lettuce, tomatoes, cucumbers, and dressing.

• A brick wall made from many identical bricks.

• ​Cut in half

• Glue on pages 6-7

• Title: "Element and Compound Notes"​