Elements, Molecules and Compounds

Elements, Molecules and Compounds

Atom

• smallest unit of matter

• basic building block of chemistry

• made of protons, neutrons, electrons

• ex: O (oxygen) N (nitrogen) B (boron)

Multiple Choice

Positive subatomic particle

• proton

• neutron

• electron

Multiple Choice

Subatomic particle found outside the nucleus

• electron

• proton

• neutron

Fill in the Blanks

How many protons?

Fill in the Blanks

What is the atomic number?

Multiple Select

What is the mass number?

• number of protons + neutrons

• number of protons + electrons

• number of electrons + neutrons

Multiple Choice

What is the number of neutrons?

• 294

• 118

• 176

• 412

Element

• pure substance which cannot be broken down by chemical means

• consisting of one type of atom

• ex: O (oxygen) N (nitrogen) B (boron) O₂ (oxygen) H₂ (hydrogen)

Molecule

• group of two or more atoms that form the smallest identifiable unit into which a pure substance can be divided

• ex: O₂ (oxygen) N₂ (nitrogen) H₂ (hydrogen)

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Compound

• substance formed when two or more chemical elements are chemically bonded together

• ex: CH₄ (methane) H₂0 (water) CO₂ (carbon dioxide) CO (carbon monoxide) C₆H₁₂O₆ (glucose) NaCl (salt) NaHCO₃ (Baking Soda)

Multiple Choice

Element or Compound

Copper (Cu)

• element

• compound

Multiple Choice

Element or Compound

Table Sugar C₆H₁₂O₆

• element

• compound

Multiple Choice

Element or Compound

Neon Gas Ne

• element

• compound

Multiple Choice

Element or Compound

Silver Au

• element

• compound

Multiple Choice

Element or Compound

Sand

• element

• compound